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