The Superior Tool Basin Buddy Faucet Nut Wrench is designed with unique slots that grab locknut wings without breaking them off. Universal tool fits metal lock nuts, coupling nuts, PVC locknuts, most metal and plastic toilet supply nuts. Cutaway design fits around existing supply lines to remove coupling nut. Once coupling nuts is removed, cutaway fits around the faucet shank (½”) to remove metal and plastic nuts. Use with ¼” or 3/8” ratchet drive, adapter included.