Get the right bits for your driver-drill or hammer driver-drill. The 18 pc. Assorted drill bit set (D-59178) offers an assortment of straight shank bits for use in metal, wood, and masonry materials. The metal drilling bits are made of hss-g for longer life with a 135-degree split-point geometry for fast starts and reduced “walking”. the brad point wood drill bits are engineered for clean, straight holes in wood, and the masonry hammer drill bits can be used in most hammer drills for use in brick, Block, and concrete. The straight shank bits are for use with most corded and cordless 3/8” and ½” drills (drills sold separately).