The Takeaway: Diablo’s Impact Strong Step Drill Bits are a fast, convenient way to drill holes from 3⁄16 of an inch to 1-1⁄8 inches without having to swap bits.While they can drill many ...

I broke two bits drilling holes in my garage floor with a rented hammer drill. What did I do wrong? David D., Boise, Idaho. The most obvious possibility is that you hit a piece of rebar, or ...