HMT VersaDrive TurboTip Impact Drill Bit InsertFoam Set, 3/16, 1/4, 5/16, 1/2"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