I ordered this kit to drill some holes for a sink in a granite countertop. This blade went through a 3/4 inch plate in just a few minutes. Super clean cut, great impression. Looks like it's ready to go again - definitely not a cheap drill. It's better than this set. Disclaimer: My husband put blue tape on the granite so we could see where to drill (the granite is black) so the tape kept the water line from "caulking" the granite and the water from leaking out. It wasn't a big deal - we just kept a towel handy and I sprayed water as it cut through.