RTC Pro Drill Bit with High Concentration of Diamond for Porcelain

Take the Probit Challenge: Precision Cuts Close to the Edge and Corners
The problem often faced by professionals and handymen alike when tile remodeling or installing is not damaging the existing tile when drilling necessary holes. For instance when you are adding improvements such as shower curtain rods, or drilling new holes to accommodate new plumbing. Imagine yourself having to explain to your customer that you damaged a tile or two; it wouldn't be a major problem unless that tile happened to be irreplaceable 30 year old tile. In addition to porcelain, ceramic, and natural stone, the Probit also works great on glass & glass tile!

The RTC Porcelain Pro Drill Bit is made of a high concentration of diamond-infused fluted electroplated steel. It also has a very long job life and is rated to make 50 precision cuts into porcelain tile before beginning to lose its precision cutting ability. RTC Porcelain Pro Drill Bit will make quick and easy work out of your precision cuts close to the edge of tiles as well as tile corners!

Although the The RTC Porcelain Pro Drill Bit is specifically designed to cut through porcelain and has a cut life of 50 holes for porcelain tiling, when used properly, these porcelain drill bits are able to cut through ceramic, marble, glass tile, granite, hard PVC, and other hard materials. These bits are not your average diamond hole saw! The difference is that these bits are specially designed and are uniquely superior when compared to the typical hole saw! Included with this Probit is a unique push-rod for clearing debris. This prevents your hole saw from becoming ruined by a piece of tile becoming stuck in it.


  • High diamond concentration electroplated steel
  • Precision cuts in corners and near the edges of tile
  • For use with most types hand-held drills, including cordless drills (800-2500 RPM)


  • For wet use only
  • Using with a drill press will shorten bit life
  • Cutting into backer-board will shorten bit life
  • Not for use with Hammer Drills


  • Cutting Diameter ................1/8" (3-mm)-6"
  • Cutting Depth (max) .............2"
  • Rim Type ..........................Continuous
  • Chuck Size ....................... 3/8 in.
  • Avg. Cut Life .................... 30 cuts (when used at low RPM and kept WET)
Rated 4.6 out of 5 stars
Based on 13 reviews
Total 5 star reviews: 9 Total 4 star reviews: 3 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
13 reviews
  • MP
    Mark P.
    Verified Buyer
    RTC Diamond Turbo Hole Saws
    RTC Diamond Turbo Hole Saws
    I recommend this product
    Rated 5 out of 5 stars
    6 months ago
    Great bits

    These bits work very well, we drill a lot of stone and concrete so I am hoping for a long life out of these. Thank you

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