Bosch Rotary Hammer Bit SDS Max 7X28X400X520 mm 2608586785 SDS max-7 Drill Bit is ideal for use at the highest drilling speeds Solid carbide S-cutter and inclined side cutters enable very fast drilling Vibration-optimized flute design offers the best power transfer and increases speed Fits all SDS max rotary hammer drills. Materials: Soft stone, Hardstone, Concrete, Reinforced concrete, Concrete building block Diameter (D) mm: 28 Working length (L1) mm: 400, Total length (L2) mm: 520 Choose a pack size: 1 Pcs