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 Designed to tap up to 10-gauge metal 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 Size #8 Thread Per Inch 32 TPI Thread Type NC