Bosch AutoStart Pilot Bit for Diamond Hole Saws is designed for heavy-duty performance with a durable hex shank that easily snaps into the mandrel for quick and secure attachment. Made from construction-hardened steel, this pilot bit features a retractable center pin and a carbide tip, ensuring long-lasting precision and reliability during use. This combination of materials and design makes it an excellent choice for professionals seeking efficient and dependable drilling with diamond hole saws. Model Number: