Diameter: 22 mm, total length: 210 mm. The double-helix spiral grooves ensure easier drilling thanks to optimal flour transport. The SDS Plus drill bit has a tungsten carbide head with 4 cutting edges for fast drilling progress without dripping. For all hammer drills with SDS-Plus shank. For hard materials such as stone, concrete, natural stone, brick wall. Easily drill holes in ceilings, walls.