FeaturesComplete hole drilling, tapping and deburring/countersinking in one operation with power drill saves labor and timeBack tapered beyond tap to prevent thread damage from over drillingDeburr/countersink also provided on bit beyond back taperMade from hardened high speed steel versus carbon steel for longer lifeHigh quality hex shank to ensure strong connection to drill chuckDesigned to tap up to 10 ga metalFor mild steel, copper, brass and aluminumSplit point with web thinning