PRODUCT FEATURES:- Complete hole drilling, tapping and deburring/countersinking in one operation with power drill saves labor and time - Back tapered beyond tap toprevent thread damage from over-drilling - Deburr/countersink also provided on bit beyond back taper - Made from hardened high-speed steel vs. carbon steel forlonger life - High quality hex shank to ensure strong connection to drill chuck - Designed to tap up to 10-gauge metal - Quick change adaptor included in both metric and standard kits