The MILWAUKEE HOLE DOZER with Carbide Teeth Cobalt Pilot Bit delivers up to 10X longer life than standard pilot bits. The Quad Edge tip decreases heat build-up while drilling, and a 135 split point allows for accurate and precise hole placement. This Milwaukee Hole Saw Cobalt Pilot Bit is designed for use in stainless steel, cast iron, wood, metal & abrasive materials. For best performance use with Milwaukee HOLE DOZER with Carbide Teeth Hole Saws.