This quick-connect RS PRO coupling offers one-handed operation for joining pneumatic lines. It automatically seals when you connect or disconnect it, preventing pressure loss and air leaks.The coupling is used on the supply side of the connection. Its built-in valve prevents the flow of air when removing the connector, letting you disconnect it safely and easily. The 1/4-inch thread on its rear allows you to attach it to your hose or air supply.You can use the connector with Rectus Series 26 or 25 parts, making it a good choice for use with existing pneumatic systems. It's used for applications with flow rates of up to 1000 L/min, so it's ideal for use with tools like impact drivers and nail guns in your garage or workshop.