• Rated Excellent

    4.7/5 on Shopper Approved

  • Trusted Quality

    Serving contractors since 1994

  • Highly Recommended

    92% of customers recommend us

  • Extensive Selection

    150+ trusted industry brands

Find my product

Find my Product

Find My Product

Let's Find the Right Tool for You

  • Diamond Tools ›
  • Material Handling Equipment ›
  • Saws ›
  • Floor Machines ›
  • Construction Equipment ›
  • Chemicals ›
  • Drilling Equipment ›
  • Router Bits & Machines ›
  • Handheld Power Tools ›
  • Tooling ›
  • Concrete Finishing Equipment ›
  • Dust & Water Recycling ›
  • Safety & Protective Equipment ›
  • Tile & Shower Installation ›
  • Shop Supplies & Accessories ›
  • Sinks, Faucets & More ›
  • Woodworking ›
  • Metalworking ›
  • Landscape Equipment
  • Miscellaneous ›
  • Diamond Blades ›
  • Diamond Core Bits ›
  • Diamond Grinding Tools ›
  • Diamond Polishing Pads ›
  • Stone Router Bits ›
  • CNC Tooling
    • Concrete / Asphalt / Brick / Pavers Blades
    • Granite Blades
    • Porcelain / Tile / Dekton Blades
    • Marble Blades
    • Specialty Diamond Blades
    • Glass Blades
    • Quartz Blades / Engineered Stone
    • Metal Blades
    • Quartzite Blades
    • Core Bit Adaptors and Accessories
    • Concrete Core Drill Bits
    • Engineered Stone Core Drill Bits
    • Glass Core Drill Bits
    • Granite Core Drill Bits
    • Marble Core Drill Bits
    • Porcelain / Tile Core Drill Bits
    • Grinding Concrete
    • Grinding Granite / Marble / Natural Stone
    • Grinding Metal / Steel
    • Sandpaper
    • 3-Step Diamond Polishing Pads
    • Backer Pads
    • Concrete Polishing Pads
    • Engineered Stone Polishing Pads
    • Granite / Marble / Natural Stone Polishing Pads
    • Microfiber
    • Nylon Floor Pads
    • Specialty Diamond Polishing Pads
    • Steel Wool
    • Continuous Rim Router Bits
    • Drum Wheels / Tolerance Wheels
    • Electroplated Router Bits
    • Hand Profile Router Bits
    • Parts and Accessories for Stone Routers
    • Profiling Wheels
    • Segmented Router Bits
    • Vacuum Brazed Router Bits
    • Buckets
    • Dozer Products
    • Excavators
    • Excavator & Backhoe Attachments
    • Forklifts
    • Forklift Attachments
    • Lifting Equipment ›
    • Loading Dock Equipment ›
    • Mini Skid Steer Attachments
    • Miscellaneous Attachments
    • Miscellaneous Handling Accessories
    • Rakes
    • Skid Steer Attachments
    • Storage Equipment & Solutions ›
    • Storing and Handling Equipment ›
    • Tables and Stands ›
    • Tractor Attachments
    • Trenchers
    • Truck and Tow Supplies
    • Wheel Loader Attachments
      • Aerial Lifts
      • Beam Clamps
      • Carpet Poles
      • Carrying Clamps
      • Cranes
      • Drum Lifting and Handling
      • Fence Post Puller
      • Forklift Booms / Forks / Extensions
      • Glass Lifters
      • Hoists
      • Horizontal Lifters
      • Lifting Clamps
      • Monument Clamps
      • Mounting Cups
      • Parts and Accessories for Lifting Equipment
      • Paving Slab Lifters
      • Pipe and Barrier Lifters
      • Scissor Clamps
      • Shackles / Hooks
      • Slab Lifters
      • Spreader Bars / Beams
      • Stackers
      • Suction Cups
      • Vacuum Lifters
      • Work Platforms
      • All Lifting Equipment
      • Dockplates and Dockboards
      • Dock Levelers
      • Dock Safety Equipment
      • Dock Seals / Shelters
      • Yard Ramps
      • All Loading Dock Equipment
      • A-Frames
      • Cabinets & Shelving
      • Containers
      • Industrial Racks
      • Pallet Racks & Accessories
      • Slab & Bundle Racks
      • Storage Buildings & Structures
      • Tool Boxes & Cases
      • A-Frames
      • Carts and Dollies
      • Countertop Support Systems
      • Drywall Carts
      • Dumpsters
      • Hand Trucks
      • Large Format Equipment
      • Pallet Jacks
      • Scaffolding
      • Slab and Bundle Racks
      • Snow Plows
      • Tool Boxes
      • Truck & Tow Supplies
      • Picnic Table and Benches
      • Scissor Lift Tables
      • Stands
      • Tilters
      • Work Tables
      • Blue Ripper / Rail Saws
      • Bridge Saws and CNC Machines
      • Chain Saws
      • Concrete Saws ›
      • Cut-Off Tools
      • Handheld Saws
      • Metal Saws ›
      • Panel Saws
      • Parts and Accessories for Saws
      • Stone Saws
      • Tile Cutters
      • Tile Saws / Wet Saws
      • Trenchers
      • Wood Saws ›
        • Concrete Chainsaws
        • Concrete Groover Machines
        • Concrete Hand Saws
        • Concrete Wall Saws
        • Dustless Concrete Saws / Gorilla Saws
        • Masonry Saws / Table Saws
        • Ride-On Concrete Saws
        • Soff-Cut Concrete Saws
        • Walk-Behind Concrete Saws
        • Wire Saws
        • Abrasive Cut Off Saws
        • Cold Saws
        • Manual Cold Saw
        • Metal Band Saws
        • Semi-Automatic Cold Saw
        • Wood Band Saws
        • Wood Table Saws
        • Auto Scrubbers
        • Concrete Scarifiers
        • Driver Plates & Floor Brushes
        • Floor Grinders
        • Floor Polishers & Burnishers
        • Floor Scrapers
        • Shot Blasters
        • Parts & Accessories for Floor Machines
        • Rotary Erasers
          • Access Solutions ›
          • Auger Equipment
          • Bucket Lifts
          • Building Materials
          • Caulk Guns
          • Compaction Equipment ›
          • Concrete Buckets
          • Concrete Mixers
          • Concrete Pumps
          • Construction Supplies
          • Cutting Attachments
          • Drain Cleaning Equipment
          • Generators
          • Hydraulic Pumps
          • Ladders
          • Mortar Tubs
          • Pneumatic (Air) Tools ›
          • Pressure Washers
          • Rebar & Rebar Tools/Equipment ›
          • Scaffolding
          • Stair Treads & Nosing
          • Street Sweepers & Floor Sweepers
          • Surface Protection ›
          • Track Dumpers & Buggies
          • Underwater Tools
          • Water Pumps & Trailers ›
          • Welders
          • Welding Products
            • Access Doors
            • Roof Hatches
            • Smoke Vents
            • Forward / Reversible Plate Compactors
            • Plate Compactors
            • Rammers
            • Vibratory Rollers
            • Air Compressors
            • Air Ducting
            • Air Manifolds
            • Air Misters
            • Air Movers
            • Air Polishers
            • Air Rammers
            • Air Receiver Tanks
            • Chipper Hammers
            • Clay Diggers
            • Filters-Regulators-Lubricators
            • Jet Fans
            • Marine Blowers
            • Moisture Separating Systems
            • Paver Breakers
            • Pipe Line Blowers
            • Pneumatic Impact Wrenches
            • Rivet Busters
            • Riveting Hammers
            • Rock Drills
            • Scalers
            • Cutting Edge Saw
            • Fiberglass Rebar
            • Rebar Benders
            • Rebar Cutters
            • Rebar Support
            • Drop Cloths
            • Flooring Paper
            • Mats
            • Paint Protective Film
            • Temporary Flooring
            • Trash and Water Pumps
            • Utility Trailers
            • Water Trailers
            • Adhesives ›
            • Anti-Spatter
            • Caulk, Sealants & Accessories ›
            • Cementitious Products & Liquids
            • Chemical Sprayers
            • Cleaners
            • Concrete Densifiers
            • Concrete Coatings & Epoxy
            • COVID-19 Supplies
            • Crystallizers
            • Fire Safety
            • Insulation
            • Lubricants & Oils
            • Paint & Accessories
            • Polishing
            • Removers, Specialty & Miscellaneous
            • Sealers
            • Stains
              • Construction Adhesives
              • Spray Adhesives
              • Stone Adhesives
              • Wood Glue
              • Caulks & Sealants
              • Caulk Guns
              • Core Drilling Equipment
              • Handheld Drills
              • Mag Drills
              • Metal Drill Press
              • Rock Drills
              • Wood Drill Press
                • Stone Router Bits ›
                • Stone Routers
                  • Continuous Rim Router Bits
                  • Drum Wheels / Tolerance Wheels
                  • Electroplated Router Bits
                  • Hand Profile Router Bits
                  • Parts and Accessories for Stone Routers
                  • Profiling Wheels
                  • Segmented Router Bits
                  • Vacuum Brazed Router Bits
                  • Air Rammers ›
                  • Angle Drills
                  • Angle Grinders
                  • Chipper Hammers
                  • Clay Diggers
                  • Cut-Off Tools
                  • Die Grinders
                  • Handheld Drills
                  • Handheld Scarifiers
                  • Handheld Saws
                  • Hammer Driver-Drills
                  • Impact Wrenches ›
                  • Miscellaneous Machines
                  • Nail Guns
                  • Needle Scaler / Flux Chipper
                  • Paving Breakers
                  • Polishers ›
                  • Rivet Busters
                  • Riveting Hammers
                  • Rotary Hammers
                  • Scalers ›
                    • Benchtop Sand Rammers
                    • Floor Sand Rammers
                    • All Air Rammers
                    • Cordless Impact Wrenches
                    • Pneumatic Impact Wrenches
                    • Air Polishers
                    • Wet Polishers
                    • All Polishers
                    • Chisel Scalers
                    • Needle Scaler
                    • Piston Scaler
                    • Scaler Vacuum Attachment
                    • Annular Cutters
                    • Bolt Cutters
                    • Box Cutters
                    • Concrete Anchors
                    • Concrete Safety Forming Tools
                    • Design Tools
                    • Drill Bits
                    • Drywall Tools
                    • Flashlights
                    • Floor Scraper Blades & Accessories
                    • Hammers & Chisels
                    • Masonry Hand Tools
                    • Reamers
                    • Sandpaper
                    • Screws
                    • Wrenches
                      • Chemical Sprayers
                      • Concrete Screeds
                      • Concrete Vibrators
                      • Ride-On Concrete Trowels
                      • Walk-Behind Concrete Power Trowels
                        • Vacuums & Dust Collection Equipment ›
                        • Water & Slurry Recycling
                          • Air Cleaners
                          • Air Ducting
                          • Air Misters
                          • Air Movers
                          • Dust Collection Booths
                          • Dust Extractors
                          • Dust Shrouds
                          • Marine Blowers
                          • Pipe Line Blowers
                          • Temporary Dust Wall
                          • Wet / Dry Vacuums
                          • Aprons & Sleeves
                          • Coveralls
                          • Fall Protection
                          • Fire Safety
                          • Gloves
                          • Hard Hats & Accessories
                          • Hearing Protection
                          • PPE Drying
                          • PPE Washing
                          • Respiratory Protection
                          • Safety Apparel
                          • Safety Glasses
                          • Shoe Covers
                          • Traffic Safety
                            • Shower Installation ›
                            • Tile Leveling & Spacing
                            • Tile Tools
                              • Building Panels
                              • Membranes
                              • Shower Drains
                              • Shower Shelves
                              • Tile Trim/Profiles
                              • Adapters
                              • Backer Pads
                              • Batteries
                              • Box Cutters
                              • Brackets, Clamps, & Clips
                              • Caulk Guns
                              • Clamps and Vises ›
                              • Communication Devices & Accessories ›
                              • Dressing Stones & Tools
                              • Marking & Measuring Tools ›
                              • Microfiber
                              • Miscellaneous Supplies
                              • Rags
                              • Respiratory Protection
                              • Tape
                                • Clamps
                                • Vises
                                • Antennas
                                • Chargers & Battery Packs
                                • Two-Way Radios
                                • Chalk Lines
                                • Lasers
                                • Levels
                                • Marking
                                • Measuring Wheels
                                • Tape Measures
                                • Bathtubs
                                • Cutting Boards
                                • Faucets
                                • Garbage Disposals
                                • Shower Heads
                                • Sinks
                                • Sink Grids
                                • Specialized Plumbing Tools
                                  • Blades for Wood
                                  • CNC Router Tables
                                  • Dovetail Machines
                                  • Mortiser
                                  • Power Feeders
                                  • Sanders
                                  • Shapers
                                  • Wood Clamps
                                  • Wood Drill Press
                                  • Wood Dust Collection
                                  • Wood Glue
                                  • Wood Jointers
                                  • Wood Planers
                                  • Wood Saws ›
                                    • Wood Band Saws
                                    • Wood Table Saws
                                    • Annular Cutters
                                    • CNC Machines ›
                                    • Hoist
                                    • Ironworker Machines
                                    • Metal Drill Press
                                    • Metal Lathes
                                    • Metal Saws ›
                                    • Sheet Metal Equipment ›
                                    • Tube & Pipe Tools ›
                                    • Welding Products ›
                                      • CNC Mills
                                      • Laser Tables
                                      • Plasma Table
                                      • Water Jets
                                      • All CNC Machines
                                      • Abrasive Cut Off Saws
                                      • Cold Saws
                                      • Metal Band Saws
                                      • Manual Cold Saws
                                      • Semi-Automatic Cold Saws
                                      • Sheet Metal Brakes
                                      • Sheet Metal Combination Machines
                                      • Sheet Metal Shears
                                      • All Sheet Metal Equipment
                                      • Tube & Pipe Cutters
                                      • Tube & Pipe Benders
                                      • Anti-Spatter
                                      • Concrete stamps
                                      • Decorative Glass ›
                                      • Walnut Shells
                                        • Frosted Glass
                                        • Landscape Glass
                                        • Terrazzo Glass
                                        Sale
                                        Walter Surface Technologies

                                        Extension adaptors

                                        SKU# 05Z023
                                        $61.29 Was: $72.10 Save $10.81
                                        Shipping calculated at checkout.
                                        Legnth
                                        Secure Checkout

                                        Safe & Secure Payments

                                          • Amazon
                                          • American Express
                                          • Apple Pay
                                          • Diners Club
                                          • Discover
                                          • Meta Pay
                                          • Google Pay
                                          • Mastercard
                                          • PayPal
                                          • Shop Pay
                                          • Visa

                                        You might also be interested in

                                        • Morse taper shank adaptor without coolant inducer Walter Surface Technologies
                                          Sale

                                          Walter Surface Technologies

                                          Morse taper shank adaptor without coolant inducer

                                          $157.73 – $157.74Save up to $27.84
                                          View details
                                        • Sale

                                          Diamond Tool Store

                                          Core Bit Extension

                                          $29.99 – $49.99Save up to $20.00
                                          View details

                                        • Diamond Tool Store

                                          5/8"-11 Adapter for Power Drills

                                          $18.00
                                          View details
                                        • 5/8"-11 To Sector Adapter Diamond Tool Store

                                          Diamond Tool Store

                                          5/8"-11 To Sector Adapter

                                          $59.00
                                        • Flush-Cut Blade Adapter Diamond Tool Store

                                          Diamond Tool Store

                                          Flush-Cut Blade Adapter

                                          $18.00
                                          View details
                                        • Aluminum Flush-Cut Blade Adapter Diamond Tool Store

                                          Diamond Tool Store

                                          Aluminum Flush-Cut Blade Adapter

                                          $18.00
                                          View details
                                        • Adaptor for Cup Wheels Diamond Tool Store

                                          Diamond Tool Store

                                          Adaptor for Cup Wheels

                                          $18.00
                                          View details
                                        • TCT LongCut Unibor
                                          Sale

                                          Unibor

                                          TCT LongCut

                                          $67.18 – $112.70Save up to $11.27
                                          View details
                                        • Sale

                                          Unibor

                                          SITEH3RO™ Ultimate Kit

                                          $1,415.00 Was: $1,556.50 Save $141.50
                                          View details
                                        • Sale

                                          Unibor

                                          SITEH3RO™ Car Reamer Kit

                                          $490.34 – $1,737.31Save up to $104.69
                                          View details

                                        • Diamond Tool Store

                                          Core Bit Rubber Suction Ring

                                          $8.50 – $10.00
                                          View details
                                        • Sale

                                          Diamond Tool Store

                                          Core Bit Extension

                                          $29.65 – $81.68Save up to $8.17
                                          View details
                                        • Sale

                                          Unibor

                                          37000 SERIES TCT Rail Annular Cutter

                                          $458.40 – $582.84Save up to $58.28
                                          View details
                                        • Core Bit Thread Adaptor Diamond Vantage
                                          Sale

                                          Diamond Vantage

                                          Core Bit Thread Adaptor

                                          $95.42 Was: $190.85 Save $95.43
                                          View details
                                        • Core Bit Extensions Diamond Vantage
                                          Sale

                                          Diamond Vantage

                                          Core Bit Extensions

                                          $95.42 Was: $190.85 Save $95.43
                                          View details

                                        Product Description

                                        Extension 1" Weldon shank with screws

                                        Leverage an arbor adaptor with your Walter core cutters to drill deeper holes. These arbor adaptors are made to last longer and allow you to drill up to 4" for a fraction of the price of a full-size core cutter.

                                        Technical Specifications


                                        Diameter
                                        Imperial
                                        		 Metric
                                        		 Length
                                        		 Order No
                                        		 Min. Pkg.
                                        1 " 05-Z 023 1
                                        2 " 05-Z 024 1

                                        Frequently Bought Together

                                        This Month’s Featured Deals

                                        View All Deals
                                        •
                                          Sale

                                          Husqvarna

                                          Husqvarna DE 130 H

                                          $6,253.20 Was: $6,948.00 Save $694.80
                                          View details
                                        • Sale

                                          Husqvarna

                                          Husqvarna K 540i Power Cutting Saw

                                          $944.10 Was: $1,049.00 Save $104.90
                                          View details
                                        • Sale

                                          Husqvarna

                                          DE 120 SH Dust Extractor

                                          $2,444.40 Was: $2,716.00 Save $271.60
                                          View details
                                        • Husqvarna A 100 Air Cleaner Husqvarna
                                          Sale

                                          Husqvarna

                                          Husqvarna A 100 Air Cleaner

                                          $1,614.60 Was: $1,794.00 Save $179.40
                                          View details
                                        • Husqvarna RS 7400 D Rider Saw Husqvarna
                                          Sale

                                          Husqvarna

                                          Husqvarna RS 7400 D Rider Saw

                                          $118,153.29 – $122,841.00Save up to $13,649.00
                                          View details
                                        • Sale

                                          Husqvarna

                                          Husqvarna FS 600 E Flat Saw

                                          $5,635.80 Was: $6,262.00 Save $626.20
                                          View details
                                        • Sale

                                          Husqvarna

                                          Husqvarna BV 30i kit for Concrete Screeds

                                          $3,380.40 Was: $3,756.00 Save $375.60
                                          View details
                                        • Blade Holder Husqvarna
                                          Sale

                                          Husqvarna

                                          Blade Holder

                                          $89.73 – $339.30Save up to $37.70
                                          View details

                                        Share feedback

                                        Spotted a wrong image, a missing spec, or something that isn't working? Tell us and we'll fix it. For order questions, call 1 (800) 342-3876.

                                        What is it about?