Hi, I’m a tile installer and I love your products. Can you give me a list of all the bits you have?

Thank you very much for your kind email. We appreciate your business as a professional installer.

1 inch, 1-3/16 inch, 1-1/4 inch, 1-3/8 inch, 1-1/2 inch, 1-3/4 inch, 2 inches, 2-3/8 inch, 2-1/2 inch, 2-3/4 inch, 3 inches, 3-1/8 inch, 3-3/8 inch, 3-1/2 inch, 3-3/4 inch, 4 inches, 4-1/8 inches, 4-1/4 inches, 4-1/2 inches, 4-3/4 inches, 4-7/8 inches, 5 inches, 5-1/8 inches, 5-1/2 inches, 5-7/8 inches, 6 inches, 6-5/16 inches, 6-5/8 inches, 7 inches, 7-1/2 inches, 8 inches

If you need any specific information, please let us know.

Which is the difference between twisted diamond drill bit and normal drill bit?

Diamond drill bits that come in packs of 30 are cylindrical. The available sizes are limited to 1mm, 2mm, and 3mm. They don’t have a pointy tip. Their depth of cut is shallow. You will need to hold the tool at an angle to get the hole started. Once the hole is started, you can go vertical upright. Twisted diamond drill bits come in different packs, mixed or otherwise. Available sizes are 1mm, 1.5mm, 2.0mm, 2.5mm. Twisted diamond drill bits have a longer depth of cuts, they have the 120-degree standard pointy tip.  You can start upright. Twisted diamond drill bits are a bit more expensive than cylindrical ones.

How do you cut larger holes in tiles without breaking them?

It is easier to have success with smaller holes.  This question is usually asked about 4 inches or larger.
When you drill larger holes, the remaining tile becomes weaker due to the material removed.
There are two main remedies for this issue:
1- You need to be more patient and apply less (far less pressure). The diamond hole saw would lightly grind away the material with minimum pressure on the tile.
2- The tile has to be laid on a flat surface, possibly with a towel underneath, so that when you apply light pressure with the diamond hole saw, it will be supported at the bottom.
You can see one of our professional clients drilling a 7-inch hole with our diamond hole saw in this video.

How to cut 6-inch hole in porcelain tile?

How to cut 6-inch hole in porcelain tile?


Tiles will break if you do not support them underneath (close to the center) and if you apply pressure

Porcelain tiles are already very brittle by nature. And when you make a large hole in the tile, it becomes weaker.


One other tip could be about stopping every 30 seconds to clean the drilling area and cleaning the diamond hole saw rim.


If the tile breaks when you are almost past 90%, that means you have to be even slower and more gentle. Because during exit, the vibration and imbalance are the worst.
It could be a good idea to clamp the tile down. One of our customers used clamps and pieces of wood for both fixing and guiding the hole.
Have you seen the video by one of our professional customers?
They are drilling a 7-inch hole with our tools. And the hole is done in less than 90 seconds. In this application, the tiles have nowhere to go, and well-supported underneath.
We are hoping to hear some good news from you.

I am drilling panes of glass. 1st piece took 5 minutes 2nd piece took 10 minutes 3rd piece took nearly 30 minutes. What do you suggest?

Our diamond hole saw performed very well on the 1st cut but not so well on the 2nd and 3rd cuts. This only means that the diamond abrasives were lost at the end of the 1st cut.
It is important to note that these diamond hole saws need to be used with effective water cooling.
If you do not use water or if you apply too much pressure, the tip of the hole saw will overheat. The electroplated bond will locally lose strength causing the diamond abrasives to separate.
If you have efficient cooling, 200-300 RPM speed, and mild tool pressure, you can cut 10-20 holes in glass depending on the glass thickness.
Some of our customers are able to drill 30 bottles with one bit.

Will your diamond hole saws cut thru old wet plaster? I have multiple holes to drill for adding recessed cans.

Thank you for visiting our shop.
Diamond hole saws would not be the best tool for cutting through the plaster. Diamond hole saws are best for brittle materials such as ceramic, porcelain tiles, granite, marble, glass, etc.
We recommend using Heavy Duty Bi-Metal Hole saws with a pilot drill and eject spring.
Currently, we have the 6-inch size in stock and ready to ship.

How To Install Moen Grab Bar Anchors?

Moen has anchors for installing grab bars or corner shelves – also functions as grab bars.

How To Install Moen Grab Bar Anchors

moen secureguard
Moen Secureguard Anchor

To install the Moen Grab Bar Anchors on the tile surface in the shower, bathroom or powder room area, you will need a diamond hole saw to drill a hole in the tile and the backer board (or drywall).

The specific size that is recommended by Moen is 1-1/4 inch Diamond Hole Saw

We recommend using the Drilax Diamond Hole Saw Guide for drilling positioning the diamond hole saw on wall tiles.


What are the available diamond drill bit hole saw sizes you have?

We have almost all possible sizes from 1/24 inches to all the way to 8 inches.
You could take a look at :

Or our www.DRILAX.com web page for information.

Some of the more popular sizes are 1 inch, 1-3/16 inch, 1-1/4 inch, 1-3/8 inch, 1-1/2 inch, 1-3/4 inch, 2 inch, 2-3/8 inch, 2-1/2 inch, 2-3/4 inch, 3 inch, 3-1/8 inch, 3-3/8 inch, 3-1/2 inch, 3-3/4 inch, 4 inches…and goes up to 8 inches.

If there are specific sizes you would like to inquire about, please let us know.

Thank you

Do you need a pilot bit for diamond hole saws?

Diamond hole saw are used for brittle materials such as glass, ceramic, porcelain, granite, etc.

Pilot bits are usually not good for brittle material applications. They tend to make a crack before the hole saw starts working. The crack propagates and ruins the project.
Instead of a pilot bit, our DRILAX sets comes with a tough poly insert with can be used as a guide to hold the diamond hole saw steady.
You only need the insert for the few turns. You can continue free hand once the diamond hole saw makes the initial mark.

Or if you like, you can buy one of our DRILAX diamond hole saw guides.

These are adjustable.


I ordered Drilax Heavy Duty Diamond Hole Saw. There is no diamond coating on the tips, is this the right item that I received?

Yes, it is the right item.


There are two types of diamond hole saws:

  1. Electroplated: The diamond abrasive is coated over the hole saw. The diamond coating is visible but they will wear off easily with heat. That’s why these have to be used wet with constant cooling.
  2. Sintered Diamond: Here the diamond is actually within the material of the hole saw and it does not wear off. This is the professional type of tool that can be used over and over.


You purchased the sintered type, that is why the diamond coating is not visible.