Bosch SDS-max-4 M4 Hammer Drill Bit 30 x 400 x 520 mm 2608685873 Bosch SDS MAX masonry drill bits with Quadro-X drilling head with four cutter geometry for the toughest applications. FEATURES 4-cutter, vacuum brazing and hardening Long lifetime/No jamming in rebar Highly durable carbide Good lifetime/wear resistance Suitable for concrete and reinforced concrete, masonry Can be used in all rotary hammers with SDS-max holder Price/performance optimised 4-cutter SPECIFICATION Diameter (D): 30.0 mm Working length (L1): 400.0 mm Total length (L2): 520.0 mm