Heavy Duty Screw Machine "Stubby" Drill Bits have a shorter length for better rigidity and drilling accuracy. Recommended for drilling sheet metal, stainless steel, truck and mobile home bodies.
Screw Machine Drill as referred to as "stub drill". Heavy duty high speed steel. Black oxide treated, 135 degree split point. The short flute and overall length increases their rigidity, resulting in better hole accuracy and extended tool life.