2 Inch / 50mm Diamond Drill Bits, Diamond Hole Saw Hollow Core Drill Bits for Glass Ceramic Porcelain Tiles Marble Granite Quartz

This bit was a great value because it performed exactly as I had hoped. I used the bit to drill a hole to insert a spigot into a terracotta planter. The pot will be used with a rainchain to collect and divert roof runoff water. I used a regular handheld drill on fast speed at first to make an indentation into the pot and then I used slow speed to drill the hole. I poured water over the area about every 5 seconds to keep the pot from cracking. I found the bit easy to use because I didn't even have to press hard with the drill and I have small hands and am not partcularly strong. The hole (lol) process took less than five minutes and the bit seems barely worn. In the pictures, the worn bit is on the left. I used size 25mm for a 1 inch hole but had to enlarge the hole slightly because of the threads on the spigot; the 26mm bit would have worked better. I think I got my money's worth.

I brought this for a specific job, cutting hole for shower valve control and it worked great, just keep adding a little water and it's like butter on porcelain with minimal dust. It can be hard to start because it wants to jump around, what I did was use a dremmel diamond tip bit and scored the tile where I was gonna drill, then I started with this bit at 45 degrees and went slowly to perpendicular

These work great for 1 or 2 holes but after that, they get really dull & don't work

I do a lot of shower safety bars and I normally Buy name brand like Milwaukee which is about $45 a piece. I wanted to give these a shot and I am definitely impressed. I drilled about 16 holes with one and I could probably drill more. I really did not expect something to do that well with a price like that for not just one but two. I definitely recommend if you are drilling through tile in a shower. Great product and I do recommend!

Did the trick drilling out a larger diameter hole in the base of terra cotta pots. Spray painted the exterior of the pots, flipped them upside down, and inserted solar-powered tiki torches in them and it works and looks just fine. Use a drill press and a small amount of water while drilling, drill down very slowly... and ALWAYS wear safety glasses! Very good value.

it's good these come in a 15 pack. I used 12 of them drilling several holes in marble and tile. The base material is soft/cheap, so it doesn't hold up. It overheats easily. But, they are inexpensive enough that it got the job done and I'm satisfied. NOT a professional's tool, but if you have a job or two to get done - these should work.

Solid! Went right through 3/8 glass with a little patience of course!

Needed a diamond bit to drill through a 1" stucco wall for new plumbing. Glad I only needed to drill one hole as the bit wore out fast. It cut through but the chrome finish on the bit flaked off and when the job was done the diamond edge did not have the bite it started with. Cannot recommend this product. Waited too long to use it otherwise I would have sent it back.

got the job done. 2 holes.

Para quitar el fondo a unas botellas de vidrio, muy funcional

These work perfectly for drilling holes in glass that is 1/4" thick. In only a minute, it's through the glass. These bits are a big improvement over carbide bits. I use a small container with a piece of wood in the bottom, filled with enough water to cover the glass in order to help cool the drill bit and prevent cracking.

Using these for lapidary work. Cuts through Jasper slabs no problem. Great product!

Corta como mantequilla azulejo porcelanizado (del duro). 4 pulgadas exactas.