This MILWAUKEE Protective Tool Boot is for use with the M12 FUEL 1/4 in. and 3/8 in. High Speed Ratchets (2566-20, 2567-20) only. This ratchet boot provides users with a lightweight, durable solution to protect the tool and work surface. The durable rubber design withstands corrosive materials commonly found in maintenance environments. It's not for use on or near live electrical circuits