The drill/driver features a 1/2 in. keyless chuck with a 24-position clutch and 2- speed gearbox that adjusts the torque output to control the depth of the screw or fastener. This kit is powered a lithium-ion battery that holds a charge up to 4X longer, offers up to 20% more run time and is 45% lighter weight than Ni-Cd batteries.
Best of all, it's a part of the ONE+ World's Largest 18-Volt Tool System*.,The drill/driver features a 1/2 in. keyless chuck with a 24-position clutch and 2- speed gearbox