The Quick Nutcracker quickly removes stubborn 1/2" zinc locknuts from faucet shanks. Simply thread this tool onto the 1/2" faucet shank. Attach a 3/8" ratchet & continue tightening until the cutter blades cut the nut in half. It is to be used on 1/2" faucet shanks only. Made in the U.S.A. by PASCO.