Bosch 13618 18 Volt Brute Tough Hammerdrill Steel-reinforced collar enhances durability and protects tool Unibody power train maintains alignment between clutch, gearbox, and motor DuraShield housing is constructed to withstand real-world conditions Maximum torque: 475 inch/pounds 2-speed gearbox: high-speed mode generates 1,500 rpm and 18,000 beats per minute