HMT 603060-0083 VersaDrive 90 Degree Countersink 8.3mm (M4) The HMT 603060-0083 Countersink measures 8.3mm in diameter. The VersaDrive Countersink is a premium quality countersink with fully ground flutes and Titanium coating to help reduce wear and blunting. VersaDrive Countersinks 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. Utilise the convenience and power of an impact wrench to quickly debur and countersink holes up to 16.5mm with minimal torque kick-back against the operator. Features: 90º Point Angle for Countersunk Bolt Heads Safer use with minimal kickback Specially hardened for impact wrench use up to 16.5mm High-Grade Tool Steel for high accuracy & long life GoldMax low friction Titanium Coating to stop burnout High Strength, Non-slip shank design 1st Impact rated countersinks on the market Optimum life and performance when used with rotary pistol drills or drill presses Up to 16.5mm can be used on impact wrench & impact drivers for fast cutting performance Suitable for harder materials such as stainless steel when used at reduced RPM Use appropriate lubrication and correct RPM to achieve long tool life Specification: Diameter: 8.3mm