Made of chrome vanadium steel shank for enormous strength, for use with Tapcon fasteners. Special negative back grinding enables the tip to bore through applications such as masonry, ceramic tile, concrete, brick, fiberglass, plexiglas, cast metals, hardened steel, granite, marble, woods and plastic with a filing action rather than a cutting action. Requires no center punch, eliminates walking and can be re-sharpened. NOTE: not recommended for use on mild steel, e.g. aluminum, angle iron, copper, galvanized pipe, brass and stainless steel. Conforms to ANSI standards.
IRWIN POWER-GRIP 50508 Drill Bit, 1/8 in Dia, Straight Shank
IRWIN POWER-GRIP 50532 Drill Bit, 1/2 in Dia, Straight Shank
IRWIN POWER-GRIP 50512 Drill Bit, 3/16 in Dia, Straight Shank
IRWIN POWER-GRIP 50516 Drill Bit, 1/4 in Dia, Economy, Straight Shank