Universal faucet nut wrench fits most metal locknuts, coupling nuts, PVC (polyvinyl chloride) locknuts, as well as metal and plastic toilet supply nuts. Open side of body allows for use around connected supply lines. Unique slots grab locknut wings without breaking them off. Machined from anodized aluminum. Designed to be used with a 1/4 In. or 3/8 In. ratchet drive. 3/8 In. adapter included.