Carbide hammer and rotary hammer bits for concrete, block and rebar-reinforced work. Shank has to match the tool — SDS-Plus for the common corded and cordless rotary hammers, SDS-Max for the larger breakers, plus hex-shank bits for standard hammer drills. Four-cutter Rebar Demon heads are the ones that keep drilling straight through rebar; two-cutter bits cost less and are fine in plain concrete. Diameters run 5/32 in. to 1-1/4 in. and lengths 4 in. to 36 in., in singles and 25-packs for production drilling.
