Review on 💎 Uxcell Diamond Coated Drill Bit: Ideal for Marble Drilling Efficiency by Omar Svagera

I used these drill bits to drill four holes in a 1.25 inch piece of granite. over the hole during the process to keep the bits as cool as possible. I needed an average of two bits per hole as the abrasive wears down the tip of the drill bit. I had two bits so be warned. The bits are hollow steel cylinders and the walls aren't very thick so if too hot or wedged slightly the cylinder will easily snap. Breakages are my fault as I probably didn't know what I was doing. I finished two incomplete holes with the drill opposite side of the rock, and then use a hammer drill to knock the broken end of the bit out of the hole. Be careful not to break the drill, the broken metal end will get stuck in the bottom of the hole. ah!