• The perfect, portable tool for the professional electrician, lumber, mechanic and general contractor • An extremely productive tool that is a cost effective alternative to bi-metal holesaws for drilling holes in steel and other materials up to 1" thick • Feature two sets of three cutting blades, each with different geometries • This unique system balances the cutting forces enabling rapid, smooth drilling with better control • Special carbide teeth • One piece construction • Ejector Spring (Standard) • Safety collar stop