Special features: Rotary hammer drill bit with solid carbide precision cutting edge in special alloy, hardened at 1000 degrees and HST heat treatment for extreme resilience. Drill bits made of chrome-nickel steel, suitable for all rotary hammer drills with SDS-plus chuck, including 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, pavers, stone, walls, hard tiles, marble. With recognition from the German institute for HM rotary hammer drills used for plug holes.Technical data:material: chrome-nickel steel drill chuck: SDS-plus drill bit length: 160 mmcutting edge: carbide cutting tip: 2-sided drill diameter: 8 mmworking length: 100 mm