Fits 2457-20 (D54A,B,C) M12 3/8" Ratchet 245720 M12 3/8" Ratchet 2457-21 M12 3/8" Ratchet. NEW 42-06-1030 3/8" M12 Ratchet Head Anvil Service Kit for 2457-20 2457-21. Whether you are a or amateur enthusiasts, you can find the spiny that suits you.