Bosch Drill Bits & Parts Hammer drill bit 607735 - Bosch 2608685865, The Bosch SDS max-4 hammer drill bit measures 20x400x520mm and is designed for heavy-duty drilling. It is suitable for masonry, stone, and brickwork applications. This SDS-Max drill bit provides efficient and precise drilling performance for construction and renovation tasks. Bosch 2608685865 SDS max-4 Hammer Drill Bit 20x400x520mm Concrete Use