Switch quickly between cutter sizes without re-chucking, with a simple push and turn connection. Split-Point Cobalt Steel Pilot Drill with step design – for fast, accurate metal cutting with less force. Tungsten Carbide Teeth – optimized design for fast, easy cutting and maximum life in stainless steel – no oil required. Flange Stop – eliminates over-drilling. Slug Ejector Spring – quick, easy slug removal. This metal cutter tool produces round, burr-free holes