Craftsman Nextec 12.0 V Variable Speed 0-2200 RPM 1/4 " Li-Ion Complete Combo Kit: 4-piece set with 1/4" impact driver, 12V Lithium-ion battery, charger and case. Convenient Functional Versatility: Use for auto work, woodwork, metal work and other applications. Comfortably Powerful: 810 lbs. of forward/reverse torque for one-handed easy driving. Valuable Performance-Enhancing Features: Including variable speed, electric brake, LED work light. Portable Lasting Power: Powered by a 12-volt Lithium ion battery with quick 30-minute charge boost.