The VersaDrive Drillsink is an innovative combined drilling & ; countersinking tool to save metalworkers time & ; increase hole accuracy by drilling & ; then countersinking fixing holes in one operation.This combination tool provides perfect countersinking accuracy every time by locating the drilled hole in perfect alignment to the countersink. This helps prevent tool chatter and blunting commonly found with standard countersinks.VersaDrive DrillSinks have a patented non-slip, Hex shank suitable for use in any standard 1/2 in. drill chuck for cordless or pistol drills or used with a VersaDrive Rapid Lock adapter for use in a wide range of powertools such as Magnetic Drills.Suits M6 set screws DIN 74Drill & Countersink in one easy operationPerfect concentricity creates the perfect CountersinkGround flutes for high accuracy and long lifeHigh-Grade tool steelHigh strength, non-slip shank designGoldMax low-friction titanium coating to stop burn-outPrevents the chattering of standard countersinks