Review on DAMO Diamond Cutting Tools for Concrete, Granite, and Marble by Erik Barela

I need a 1/2 inch hole through 3/4 inch granite and it fits my Craftsman sander shaft. It was a good decision as I had the perfect hole in about ten minutes. I used a piece of hardboard with a 1/2" hole taped to the post and my wife splashed water on the chisel while I sanded. Very simple and feels like there is still a lot of life in the beat. PS the hole is a little big, but it didn't affect the installation of the faucet.