Review on 💎 Durable Uxcell Diamond Coated Ceramic Porcelain Cutting Tools for Accurate Cuts by Sam Simone

Insanely easy to use. I can't tell how long 1 bit lasts, but the first cut was clean. I'm not a big fan of spear style tips unless I'm using a drill press. With these I use a hand drill and go in at about a 30 degree angle and then slowly move the drill so that it is completely perpendicular to the material.