Fits These Models Milwaukee 2456-20 (D53A) M12 1/4" Ratchet 2457-20 (D54A) M12 3/8" Ratchet 245620 M12 1/4" Ratchet 245720 M12 3/8" Ratchet 2457-21 M12 3/8" Ratchet 2456-21 M12 1/4" Ratchet