General description Bosch SDS MAX masonry drill bits feature a Quadro-X drilling head with a four-cutter geometry designed for the toughest applications. This 28mm Professional SDS-Max-4 M4 Hammer Drill Bit is 570mm long and is ideal for drilling into concrete, reinforced concrete, and masonry. Technical specifications Drill Bit Type: Masonry Drill Bits Drill Diameter: 28mm Length: 570mm MFR Part No.: 2608685871 Overall Length: 570mm Pack Quantity: 1 Shank Type: SDS-Max Working Length: 450mm Compatibility and accessories Can be used in all rotary hammers with SDS-max holder Usage Suitable for concrete, reinforced concrete, and masonry Other information