Review on Unleash Brilliance: 💎 FACHLICH Diamond Porcelain Existing Enlarging by Hector Smith

This bit worked great! I was replacing a sink that was sitting on a granite countertop and the new sink was wider than the Kohler unit I had removed. The hole had to be enlarged. The Kohler popup was clouded, so I didn't want to reuse it. You install the bit on a 4 1/2" angle grinder. I taped a piece of cardboard (cut out where the hole was) to the granite so the blade of the grinder wouldn't scratch it. I also used the nozzle of a small shop vac sealed to suck up the granite dust. Turn on the shop vac and just let it run. Operate the mill with both hands. Take your time and the beat will work just fine. Some granite workers we live with called for at least 100 Dollars for a support call to enlarge the hole I did it for a quarter of the price and took about 5 minutes.