Hardened steel for longer life, with extra sharp centering point. Set contains 10, 16, 20, 22, 25 and 32mm. This 6-piece set features fully hardened Titanium coated high carbon steel tri-point bits with hex shanks. The precision ground point and shoulders ensure a superior clean cut and reduced splintering, making them ideal for drilling softwood, medium hardwood, particle board, plasterboard & plastics. Compatible with drills, drivers & hand braces.