49-16-2557 M12 FUEL 3/8" Ratchet Protective Boot for Milwaukee Ratchet The 49-16-2557 tool boot is for use with Milwaukee M12 FUEL 3/8" ratchet (2557-20) only. A durable rubber design will withstand corrosive materials commonly found in maintenance environments Not for use on or near live electrical circuits. Use on any other product may result in damage to tool motor.