... .Shank type: SDS Plus, SDS Max, Spline shank. SDS Hammer drill bitsShank type: SDS Plus, SDS Max, Spline shank. Features: 1 ... . tungsten carbide tip, Standard four flute design 2. Diameter:3mm-30mm; total length: 110-1000mm ... , concrete, stone, masonry, tiles and marble. 5. The electric hammer drill bits are machined from chrome steel or ally steel fitted ...