Unlike wood drill bits, rotary hammer bits are fluted along the shank so they can travel up and down like a jackhammer while working through the concrete to make the hole you need. “Drilling ...

Grego: The most common design in concrete drill bits is the two-cutter, although most users wouldn’t refer to it that way. They just know the bit by the two cutting edges on the end of the bit tip.

An impact driver shouldn't be used to drill into concrete. Masonry bits are designed to work with the hammering motion of a hammer drill. An impact driver's hammering motion is rotational ...

Lowering speed improves torque, which is helpful when drilling with larger bits into harder materials like concrete or metal. DeWalt drills also have variable speed triggers that allow you to ...