Review on 💎 Durable Diamond Marble Granite Ceramic Mandrels: Achieving Perfect Cuts and Finishes in Stone and Ceramic Projects by David Pullen

I am beyond impressed with these beats. I wasn't sure if he could drill into granite where the installer said his bits are $200 each and they can drill about 8 holes then they're dead. As you can see in the picture I was about able to Drill a 1" diameter hole in 5 minutes and it's a very clean hole for my drinking water faucet. If you're a DIYer, don't ask questions, do them.