Solid carbide 4-cutter for exceptional durability and resistance in reinforced concrete. The unique design of the flat 180 ° cutting edges enables 100% power transfer while drilling. Ultimately sharp 90 ° centering tip for deep and stable centering - no slippage when drilling. Permanent connection of the drill head. Unique induction diffusion welding technology (IDS) for a homogenous weld zone between spiral and drill head. Highest stress resistance, temperature resistance and long life under the toughest conditions. Large dust removal channels and 4 spiral design. Suitable for all commercially available rotary hammers with SDS-plus holder z. Bosch, Hilti, Metabo, Makita, Milwaukee, Skil, Duss, AEG, Atlas Copco, Berner, Black & Decker, DeWalt, Festool, Hitachi, Protool, Würth, Einhell, Worx and others