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Keeping the drill bit on target

Most of the diamond coated drill bits – hole saws are manufactured without a pilot drill bit.  People who are used the pilot drill bits from wood – plastic hole saws, may think of this as a missing component but it is actually done on purpose. Because pilot drill bits will crack glass – tile – granite, etc.


We specifically do not have the pilots because a) pilots get dull before the hole saw b) pilots have a tendency to crack some materials like glass

To help starting the hole, we have a guide.


You have to have a way to keep the drill bit on target. Here are some methods:

a- You can make your own guide out of plywood – plastic or even a card board. All you need is to keep the drill bit in place until it makes the initial marks.

b- You can start drilling at an angle, with the edge of the drill bit making a C slot and then getting the drill bit up to vertical.

 If you have one of our sets that come with the PU case and insert, the inserts can also serve as a guide to start the hole.

Please consider using our drill guide on Amazon

Here is what one of customers said about our guide:

I was anxious about drilling into my granite countertop. The Drilax guide was easy to size to my 1 1/2" diamond hole saw. I located the hole position & locked the guide into place. Once I began drilling, I felt totally at ease that the hole saw would not skip about. Huge success, remarkable value. My confidence in accurately cutting through granite, marble or tile is very high using this guide.”

8 thoughts on “Keeping the drill bit on target

  1. Ok, I have looked in the appropriate places where you suggested to find the instructions on how to use your drill guide. All I can find is the word “instruction” but there are none attached and no way to pull down a menu to further search for it. Please email to me the instructions for using this tool. Thank you

    1. Thank you for your email.

      Please find the link to the DRILAX webpage for drill guide instructions.

      One of our previous customers have made a Youtube video on this product as well:

      Thank you.


      High Quality Plastic Diamond Hole Saw Drill Guide with Suction Cup Base

      Product Base Dimension: 6″ x 8″

      Maximum Hole Saw Dimension: 4 7/8″

      Plate Face A : Holes up to 3 inches

      Plate Face B : Holes up to 4 7/8 inches

      Flip the plate to switch from Side A to Side B

      Perfect Hole Starter for : Ceramic, Glass, Granite, Porcelain or any smooth surface where the suction cup base can hold on to – Including Walls

      How to us the Guide:

      1. Adjust the slidable plate for the size of the hole saw – drill bit you want to use. Once side of the plate is for sizes up to 3 inches and flip the plate for larger sizes up to 4 7/8″

      2. Fix the guide using the suction base exactly where you want to drill the hole. Check the drill guide location and slider position before you start drilling. Measure – check twice and drill once.

      3. Using water as coolant, start the hole. You can spray the water or use the integrated hole.

      4. Use the guide until the drill bit – hole saw makes an initial mark deep enough to keep the bit in position. You can remove the guide and continue drilling in the same spot.

      5. While drilling, keep using water to cool down the diamond drill bit – hole saw. Spray bottle, running water or a small water pool around the hole can be used to cool the tool.

  2. I recently purchased a set of 1.00 mm diamond drill bits. I would like to know if I can order 1.00 mm to 1.25 mm drills with a longer (deeper) cutting shaft. Please reply at above email address, thank you!

    1. We do have a diamond twist bit set that has assorted sizes, you can check out Amazon for “drilax assorted twist diamond drill bit set”

  3. What is the MINIMUM diamond core drill size this drill guide will handle?

    1. Thank you for the question.

      Minimum Drill Bit Dimension: 1/8″ – if you remove the bearings.

      Maximum Hole Saw Dimension: 3-1/4″

      1/8″ to 1 3/4″ Diamond Hole Saws Use Plate Face A without Ball Bearings

  4. I just received the guide the pin that holds the arm that works the suction cup was loose in the package… OK I put it into the place in the arm where it obviously goes but it seems like there is or should be a tiny keeper ring for that pin… I do not find that part… does it exist and if so can you get one to me? It don’t make sense to me that the pin would be just loose in it’s hole and therefore easily lost if it falls out…

    1. Thank you for your comment.
      You are right, there is no keeper ring for that pin. We value your opinion and we will try to find a way to solve this issue for next design cycle.
      We appreciate your input.

      All our guides have been improved with an additional ring.

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