800A 25 PC Set

DRILLCO 800A 25 PC Metric HSS Drill Bit Set — Heavy-Duty Performance in Medium and High Strength Materials

The DRILLCO 800A 25-piece metric drill bit set is a premium grade high speed steel (HSS) jobber-length set designed for contractors and trades professionals who regularly drill into medium and high strength materials, including stainless steel and tougher ferrous metals. The set covers 1mm through 13mm in 0.5mm increments, providing a complete metric range for a wide variety of hole-making tasks. Each bit features a 135° split point for self-centering performance and reduced thrust, and a black and gold surface treatment for maximum lubricity. Speed, feed, and lubrication are all critical to cutting tool performance with this set.

Technical Specifications

Available Items

The black and gold surface treatment sets this set apart from standard black oxide or bright finish alternatives by providing better corrosion resistance, reduced chipping and flaking, and increased lubricity across most materials. The 135° split point design is specifically suited for curved surfaces and hand-drilling on harder materials, where a conventional 118° point would tend to walk. Jobber length provides the extra reach needed for most trade applications while maintaining rigidity.

Key Features & Benefits

Premium Grade HSS Construction

Each bit in this set is manufactured from premium grade high speed steel, the most commonly used tool material for general purpose drilling. This ensures durability and consistent performance across a broad range of medium and high strength materials, including stainless steel and tougher ferrous metals.

135° Self-Centering Split Point

The 135° split point is self-centering, which reduces the tendency for the bit to walk on contact with the workpiece — particularly important on curved or hard surfaces. It also reduces thrust requirements, meaning less force is needed to initiate and maintain the cut, reducing operator fatigue and improving hole accuracy.

Black and Gold Surface Treatment

The black and gold surface treatment provides maximum lubricity, better resistance to corrosion and breakage, and reduces chipping and flaking compared to uncoated or black oxide finishes. This treatment makes the set suitable for use on most materials encountered in heavy-duty drilling applications.

Jobber Length

Jobber length is the most common drill length because it provides extra reach while remaining suitable for the vast majority of drilling applications. This makes the 800A25 set a versatile, go-to option for contractors who need one set to handle a wide range of on-site tasks.

Complete 25-Piece Metric Range

The set spans 1mm through 13mm in 0.5mm increments, covering 25 distinct metric sizes in a single kit. This eliminates the need to source individual bits for common metric hole sizes, reducing downtime and keeping the job moving.

Common Applications

Drilling in Stainless Steel

The 135° split point and black and gold surface treatment are specifically designed for efficient drilling in stainless steel, where heat buildup and work hardening are common challenges.

Heavy-Duty Drilling in Ferrous Materials

The heavy-duty construction and premium HSS material make these bits suitable for demanding applications in tougher ferrous metals where standard general-purpose bits may wear prematurely.

Drilling in Medium and High Strength Materials

The set is rated for drilling holes in medium and high strength materials, making it appropriate for structural steel, alloy steels, and similar substrates encountered in construction and fabrication work.

General Metric Hole-Making

With 25 sizes from 1mm to 13mm, this set covers the full range of common metric hole sizes needed for fastener clearance, tapping prep, and precision hole-making across most trade applications.

Compatible Materials

• Stainless steel
• Medium strength steels
• High strength steels
• Tougher ferrous metals
• Most materials (per black and gold surface treatment specification)

Product Documents

• Safety Data Sheet (SDS) — DRILLCO HSS Cutting Tools
• DRILLCO / WALTER Product Linecard

Safety Data Summary

Hazard Information

• During normal operation and usage, high speed steel products do not present inhalation, ingestion, or other chemical hazards.
• Operations such as grinding, cutting, machining, burning, and welding may release dusts, fumes, or vapors that can present health hazards if exposure limits are exceeded.
• Excessive inhalation of metallic fumes and dusts may cause irritation of eyes, nose, and throat; symptoms may include metallic taste, dryness and irritation of the throat, chills, and fever persisting 12–48 hours.
• Chromium (present 0–5% by weight) is listed as a carcinogen by NTP and OSHA; various forms of dermatitis and inflammation of the upper respiratory tract are associated with chromium exposure.
• Tungsten (5–10% by weight): some evidence of pulmonary involvement such as cough.
• Vanadium (0–5% by weight): eye and respiratory tract irritant.
• Cobalt dust (if present from grinding) is associated with respiratory diseases including occupational asthma and interstitial fibrosis.
• Skin contact with dust can cause irritation or allergic skin rash due to cobalt sensitization.
• Fine metal particles produced when ground or sawed can burn; high concentrations in air may present an explosion hazard.
• NFPA Hazard Rating: Health 1; Flammability 0; Reactivity 0.

Personal Protective Equipment

• Wear safety glasses or goggles with side shields; do not wear contact lenses when handling these materials.
• Cloth or leather gloves are recommended when contact with dust or mist is likely.
• Use an appropriate NIOSH-approved respirator if airborne dust concentration exceeds the applicable PEL or TLV.
• Hearing protection may be required.
• Always use machine guards and wear protective clothing to prevent injury in the event of tool breakage.
• Employer should provide an eye wash station within the immediate work area for emergency use.

Safe Handling

• Use only with local exhaust ventilation adequate to limit personal exposure to airborne dust below PEL or TLV levels.
• All grinding, welding, or fume-generating operations should be performed in well-ventilated areas.
• Wash hands thoroughly after handling and before eating or smoking; wash exposed skin at end of work shift.
• Do not shake clothing, rags, or other items to remove dust — remove dust by washing or vacuuming with appropriate filters.
• Clean up spills using methods that avoid dust generation: vacuum with appropriate filters, wet dust mop, or wet clean-up.
• Store in a dry place in a manner that prevents accidental environmental contamination from traces of industrial lubricants or wetting oils.
• Soiled clothing should be laundered separately.
• Incompatible with strong acids and strong oxidizers.
• For powder fires: smother with dry sand, dry dolomite, ABC-type fire extinguisher, or flood with water. Do not release runoff from fire control to swales or waterways.
• Dispose of in compliance with federal, state/provincial, and local environmental regulations; send to an appropriate reclamation facility if available.

Frequently Asked Questions

Q: What materials is the 800A25 set designed to drill?
A: The set is designed for drilling holes in medium and high strength materials, including stainless steel and tougher ferrous metals. The black and gold surface treatment also makes it suitable for use on most materials.

Q: Why does this set use a 135° split point instead of a conventional 118° point?
A: The 135° split point is self-centering, which reduces walking on contact — especially important on curved or hard surfaces — and reduces the thrust required to drill. A conventional 118° point is better suited to mild steels and free-machining materials, while the 135° split point is preferred for harder materials and hand-drilling applications.

Q: What is the advantage of the black and gold surface treatment over black oxide?
A: The black and gold surface treatment provides better resistance to corrosion and breakage, increases lubricity, and reduces chipping and flaking compared to black oxide. Black oxide is generally suited to low to medium tensile strength materials, while black and gold is rated for most materials.

Q: What sizes are included in the 800A25 set?
A: The set includes 25 metric sizes from 1mm to 13mm in 0.5mm increments, covering the full range of common metric drill sizes in a single kit.

Q: Are speed, feed, and lubrication important when using these bits?
A: Yes — DRILLCO specifically notes that speed, feed, and lube are all critical to cutting tool performance. Using appropriate cutting fluid and correct feed rates will extend bit life and improve hole quality, particularly in stainless steel and high strength materials.