Kingston Brass HCC12T1 is a lock nut specifically designed for use with Kingston Brass' wall-mount tub/shower faucets. It is a 2-piece set that includes a cone nut and a washer. The cone nut is used to secure the shower hose to the shower cradle, while the washer is used to create a seal between the shower cradle and the side hole of the shower hose. The lock nut is made of brass and has a polished chrome finish. It is easy to install and can be tightened by hand using a screwdriver.