The Mac Tools 1/4" and 3/8" Sealed Head Ratchets, Nos. MCF520B/MCF520GE1, feature a 20V MAX brushless motor and an interchangeable anvil design that allows users to switch between 3/8" square drive, 1/4" square drive, and 1/4" low-profile hex configurations. Designed for accessing fasteners in tight spaces, the ratchets feature a sealed head, an accessible forward/reverse switch, and an integrated trigger lock. Built to withstand harsh working environments, the ratchets resist oil, grease, and solvents. A built-in LED light provides additional visibility in dimly lit work areas.