One piece hardened carbon steel body and hex shank for a stronger, more concentric bit * Carbide grade tip for faster penetration and longer bit life * Hammer drill rated for use in either standard or hammer drills * 1/4-inch quick-change hex for fast bit changes * Included sizes: 5/32, 3/16, 1/4, 5/16, 3/8, and 1/2-Inch