15/64 COLBALT DRILL BIT

15/64″ Cobalt Drill Bit .2344 decimal equivalent 2 5/8″ flute length 3 7/8″ overall length. Cobalt drills feature a 135 degree split point for instant penetration without a center punch. These drills are made from a special alloy of M42 steel containing 8% cobalt. The extra thick drill core adds further rigidity and strength.