Viking Drill and Tool 32430 Type 602 Carbide Tipped Straight Flute Hard Steel Drill Bit, 1/2 x 6" Carbide Tipped Straight Flute Hard Steel Drill Hard steel drill bit - carbide tipped Straight flute, For use in hardened steel 48 - 65 Rockwell C Drills broken studs, springs, bolts, broken easy outs, brake drums 1/2-inch x 6-inch-inch Type 602 Carbide Tipped Straight Flute Hard Steel Drill