The Milwaukee 49-16-2557 tool boot is for use with Milwaukee M12 FUEL™ 3/8 in. ratchet (2557-20) only. This product provides a lightweight, durable solution that is meant to protect the tool and work surface. A durable rubber design will withstand corrosive materials commonly found in maintenance environments. Not for Milwaukee 49-16-2557 - M12 FUEL™ 3/8 in. Ratchet Protective Boot