Complete hole drilling, tapping and deburring/countersinking in one operation with power drill saves labor and time Back tapered beyond tap to prevent thread damage from over-drilling Deburr/countersink also provided on bit beyond back taper Power tool accessory made from hardened high-speed steel vs. carbon steel for longer 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 Specifications Material High Speed Steel Material thickness Up to 10 GA Material type Mild Steel, Copper, Brass, Aluminum Point Type Split Point With Web Thinning Shank 1/4 IN Quick Change Hex Size #6 Thread Per Inch 32 TPI Thread Type NC