The Best in Flow Water Valve is a lever-operated valve that can be used by itself like an 'open hose' or paired with any nozzle giving it convenient on/off functionality. The valve features a one-piece cast aluminum body, brass internal components, and ergonomic rubber outer grip to improve comfort and protect the valve during use. No pot metal here. The Best in Flow Water Valve's flow control knob allows you to precisely control the flow of water and the unit has a clip that holds the lever in the open position. I like to use the clip to slowly fill my wash bucket as I gather up all my washing accessories. It is also great for dialing in the perfect rinse pressure and even watering the lawn.