Champion Cutting Tool's CT5-1 Carbide Tipped Hole Cutters are the perfect portable tool for the professional electrician, plumber, mechanic and contractor looking to drill large diameter holes in tough materials using an electric drill. With proper use, the CT5-1 can be used to drill hundreds of holes, increasing productivity on any job site. The CT5-1 outperforms bi-metal hole saws. It will cut fast, accurate, bur free holes in steel plate, stainless steel, iron, aluminum, copper, cast iron, fiberglass, and plastics up to 3/16 inch thick. The ejector spring ejects the slug saving time and the safety collar stop prevents over penetration for safer, faster operation. Qty: 1