Special features: Rotary hammer drill with a fixed, precision carbide cutting edge in a special alloy, hardened at 1000 degrees and HST heat-treated for extreme resilience. Drill bits made from chrome-nickel steel, suitable for all rotary hammers with SDS-plus chucks from AEG, B+D, Bosch, Fein, Hilti TE (TE 1, TE 5, TE 15, TE 15e, TE 24, TE 25), Metabo, Hitachi, Makita, etc., for: granite, concrete, clinkers, stone, walls, hard tiles, marble. Certified by the German institute for HM rotary hammer drills used for plug holes.Technical data:material: chrome-nickel steel drill bit holder: SDS-plus drill bit length: 165 mmcutting edge: carbide cutting tip: 4-sided drill diameter: 8 mmworking length: 100 mm