18-Volt Drill/Driver features a single-sleeve 1/2-in chuck, * High-performance motor and 2-speed gearbox for heavy-duty applications * 32-position clutch with micro-adjust gives consistent torque control for driving various size screws * All metal 1/2 in. keyless chuck offers excellent bit retention and durability. * Compatible with Porter-Cable 18V Lithium or NiCad batteries