Milwaukee 48-89-1110 14-Piece Black and Bronze Drill Bit Set Thicker web reduces breakage, designed for use with portable drills Open Flute design ejects hot chips faster, in-turn keeping the bit cooler, aiding in over-all bit life Penetrates faster than conventional bits, increasing drilling rates (provides longer run-time with cordless drills) Reduces friction, increasing drill bit life Standard Equipment for 48-89-1110: (2) 1/16", 5/64", 3/32", 7/64", (2) 1/8", 9/64", 5/32", 3/16", 7/32", ", 5/16", 3/8" and case.