Luomorgo 75mm/3 inch Diamond Hole Saw, 1.1 inch Cutting Depth Diamond Diamond Drill Bits for Glass Ceramic Marble Porcelain Tile Granite Quartz Gemstone

Excelente producto, me permitió realizar la perforación fácilmente y mucho más rápido de lo que esperaba.

Not very durable, might go through a relatively soft ceramic tile, but anything thicker than 1/8", waste of time. The diamaonds just peel off and the cylinder overheats and bends.

Makes holes, no problem, just have to make sure to start properly. Maybe a bit at the angle to create some grove. After that is all smooth cutting. And price is great $4 a piece comparing to at least $14 in store

I use these to cut small holes in glass vases and they work well. Of course I use all the proper safety equipment (safety glasses, dust mask, cut-resistant glove) and I keep the glass and bit wet while drilling. I find that one of these can cut through about 5 glass vase walls (some as thick as 1/4 inch) before it gets dull. It takes some time to drill each hole, but that's the nature of drilling glass. For this price, I can't complain. These also work better than carbide tipped glass drill bits

A fraction the price of big box stores name brands and in my opinion work just as well for DIY. For professional repeated use probably not, but I've used mine a few times and still does the job even thru porcelain and ceramic. You can use the tilt technique, or I prefer to make a jig in a piece of 3/4 plywood with a same sized wood hole saw first, then carefully clamp it to my work. If you can't clamp it, have someone hold it while you get it started. A jig can slide a bit on glossy tile, but with practice it's pretty easy to master. You could probably stick on some rubber cement between the two or a self stick rubber pad to keep it from sliding around. You only need the jig to get the full circular cut started, then it's easy to hold in place without the jig in your way. More accurate than tilt method. I use higher speed on tilt method to get cut going. Seems to move around less than on slow speed. Use a little water to cut easier and save the diamond edge. With both methods, I slightly tilt saw from side to side and in circular motion as I'm cutting to keep it cutting thru. Makes a nice clean hole. Be careful of sharp cut edges.