This 5/16'' x 10'' (0.8 cm x 25.4 cm) drill bit features a patented design that drills practically everything. Robust head provides long life even in impact applications. Sharp, ground cutting edges quickly cut through hard materials. Optimal dust removal in any material as a result of the steep flute with ribs. The softened shank allows for aggressive gripping power. Tough tungsten carbide makes bit suitable for multipurpose applications.