If you regularly use a rotary hammer, the Makita 5-pc. Assorted SDS-Plus drill bit set for wood and metal deliver new levels of convenience and performance. The drill bits have an SDS-Plus shank and allow drilling in wood or metal without Switching to a drill or using a special chuck adapter. The bit is engineered for use with a rotary hammer in “rotation mode”, but includes a specially-designed shorter shank to help prevent damage from accidental use in “hammering with rotation” mode on rotary hammers. The metal drilling bits are made of grounded high-speed steel (hss-g) for longer life, with a 135-degree split point geometry for reduced “walking”. the wood drilling bit features a brad point that is engineered to provide clean, straight holes in wood. The 5-pc. Assortment includes brad point wood bits: 3/16" x 4-5/8", 1/4" x 5-1/8"; and hss-g metal bits: 1/8" x 3-7/8", 3/16" x 4-5/8", 1/4" x 5-3/16".