The Mac Tools 1/4" 3-Speed Impact Driver, Nos. MCF850B/MCF850GP1, features a 20V MAX motor and a compact design measuring under 4" in length for improved access to tight spaces. A variable 3-speed trigger allows users to adjust performance based on the application, providing greater control during fastening tasks. Built to withstand harsh working environments, the impact driver features a durable glass-filled nylon housing that resists oil, grease, and solvents. A built-in three-LED worklight provides additional visibility in dimly lit work areas.