5/8" / 16mm Diamond Drill Bit, Diamond Hole Saw, Glass Drill Bit, Tile Hole Saw Suitable for Ceramic Glass Tile Porcelain Marble (Pack of 5)

This bit works very well for a six dollar item. I made about 8 holes in 5/16 inch thick ceramic tile and all the cuts had very nice edges. One trick I used was lightly clamp a piece of plywood that had a 1-1/4 hole in it over the location on the tile. This kept the bit in place while starting out. Don’t forget to keep it wet with water when drilling. I used a pretty slow speed when drilling.

I had several cuts to make and this bit worked great.

Took the tile and placed it in a bucket with water and they worked to cut the 4 holes needed.The quality was what I expected and its price matches. They did wear out after each piece of tile I was doing as it was porcelain versus a softer ceramic. But I ended up only using 3 of the bits. They cut fairly well, need plenty of water when used but, they will get the job done.

Fits into any drill and is sturdy. I ordered the wrong size so I didn’t get to use it like I wanted to but it looked like it would work great!

I needed to put a 1/2" hole in my countertop. This thing made it through 1-1/8" of granite in about a minute using a clay dam and a little water. Looks like it could have make it through a few more holes, easily, plus I've got the second bit.Great value.

Cuts fine but is too shallow to cut through the entire counter. Get a longer shank version if you plan to use this to cut into a counter.

This drill bit worked great. It cut a smooth hole through 5/16 inch thick porcelain tile quickly and easily. I used a watering can to keep the bit cool while drilling. There is no pilot drill, so use the 45* starting technique.

Was nervous about cutting a hole in the newly installed flooring for the dryer vent tube but this tool made it a breeze. Nice clean cut through the tile and the cement board then finished off with a wood hole saw through the sub flooring. Paired it with a 4” flange found here on Amazon for a nice clean install

Cuts a very clean hole with water. Made about 30 cuts in limestone so far and bit is going strong!