Grip 3 Piece Titanium Step Drill Bit Set Drop forged, heat treated, HSS with titanium coating that provides added strength and durability Two flute design provides faster, smoother, and cleaner cuts Includes: 1 pc 3/16" to 1/2" size step bit, 1 pc 1/4" to 3/4" nine step bit, 1 pc 1/8" to 1/2" thirteen step bit