Features: Variable Speed Versa-Clutch torque system Sets screws accurately Two Batteries Technical data Volts: 12 RPM: 0 to 450 and 0 to 1,400 Maximum torque rating: 310 in./lbs. Chuck size: 1/2 in. Number of clutch settings: 24 Battery interface: Latch Battery type: Ni-cad Battery amp hr: 1.7 Battery charge time: 1 hr. Speed ranges: Two Grade: Professional Number of batteries: Two Bits: NONE Variable speed: Yes Keyless chuck: Yes Spindle lock: No Soft grip: Yes On-tool bit storage: Yes Electric brake: Yes External replaceable brushes: Yes Charger: Yes Carrying case: Yes Height: 10 in. Length: 9-1/2 in. Width: 2-3/4 in.