LEFT HAND STUB DRILL BIT COBALT STEEL 5/16in. X 3-3/4in. FLUTE LENGTH 2-1/8in. - LEFT HAND STUB DRILLS. INDUSTRIAL POLISHED FINISH 135 DEGREE SPLIT POINT. in.STUBBYin. MECHANICS LENGTH DRILL BIT FOR ADDITIONAL STRENGTH. MADE FROM PREMIUM COBALT STEEL.