A rotary hammer is a power drill that is designed to break up concrete or masonry as the bit rotates. It is a versatile tool that can drill through drywall and concrete slabs. The diameter of the holes will dictate the type of rotary hammer and the drill bits to use. Chisel and point accessories are used for small chipping jobs. Chisel drill bits deliver quick and efficient drilling. These have tapered cores for bit strength and maximum durability, especially when drilling deep holes.