Hammer drills with SDS-Plus and 4-fluted drill bit and high-grade special steel shank. The design of the drill bit gives excellent results regarding hole size and centering with a long service life. The drill design provides good results in reinforced concrete due to the 4-fluted geometry of the drill tip.The drill cuts through the reinforcement without tracking to the side. The result is a straight centred hole with a reduced risk of cracking, which means a strong and secure fastening. The 4-fluted spiral of the drill also permits excellent removal of drill dust. For drilling in concrete with or without reinforcement, natural stone, brick and other similar materials.