This countertop faucet mounting nut is an essential tool for any plumber. It ensures the faucet is securely fixed to the countertop, preventing it from loosening over time. Made of plastic and metal with internal threads, the nut is easy to install without additional tools. It is part of a faucet installation kit and is used in conjunction with other kit components. It is ideal for users who want to their faucets are firmly secured to their countertops. Simple to use, installation requires no special skills.