Well I thought it would be cool to use. I'm a big fan of Diablo circular saws, these hole saws are disappointing. First thing I did was drill a hole in the filing cabinet and snap off a few teeth, I sent it back to the seller. Obviously they say I used it wrong hahaha yes I put the drill in and drilled with it. Remember it's your fault. The teeth on them are too wide apart, making them aggressive and seizing, and the teeth break.