HMT 209015-0085 VersaDrive TurboTip Impact Drill Bit 8.5mm The HMT 209015-0085 has an 8.5mm diameter and a stepped tip. VersaDrive TurboTip Impact drill bits are stepped tip bits that drill at twice the speed of standard bits without the need for pilot drilling while cutting a perfectly round hole. Turbocharge your drilling performance by using this revolutionary tool with an impact wrench or impact driver. Double hardened and titanium coated for faster drilling & reduced wear. VersaDrive TurboTip drill bits have a patented non-slip, Hex shank suitable for use in any standard 1/2 drill chuck for cordless or pistol drills or used with a VersaDrive Rapid Lock adapter for use in a wide range of power tools such as Magnetic Drills. Features: Patented Drill Point 50% Faster Drilling with 30% less pressure Incredible Finished Hole quality Instant drill start with no slipping No \'snatch\' when drill bit breaks through Fantastic Tool Life Fully Impact Rated on structural steel For fastest performance use on impact wrenches & impact drivers For optimum life and accuracy use with pistol drills and magnet drills Suitable for use on Stainless Steel and harder materials if used at low RPM in rotary tools Use appropriate lubrication and correct RPM to achieve long tool life Specification: Diameter: 8.5mm