.#15 Cobalt Long Threaded Shank Drill Bit Overall Length 2-1/8 When drilling low tensile strength materials. When drilling low tensile strength materials, the Type "D" cobalt drill will have a significantly greater tool life than the NAS 965 Type B high speed steel adapter drill, resulting in a much lower cost per hole.
Gold and black surface treated for use in stainless steel and other hard metal drilling.#25 HSS Black & Gold KFD Split Point Jobber Length Drill Bit Killer Force Drills (KFD) have a heavy duty 135 degree split point for self-centering and reducing thrust..