Airtight Design: Our spring-loaded quick release connector has a built-in valve that cuts off the air when changing tools, making the replacement process safer and faster Quick Connection: Simply insert the connector directly when using and slide the snap ring completely back after use to separate it. No need for tedious operations and improve work efficiency Sturdy and Durable: Air line connectors made of heat-treated hardened steel with nickel-plated surface, strong and durable, rust and corrosion resistant, ensure long-term use Wide Application: These air fittings are suitable for air tools, air compressors, air hoses, etc., suitable for 1/4" BSP fittings and connectors. Reduce accidental disconnection of the air line when changing tools Size: 1/4" BSP Threaded Hose Connector: 1 x Female External Thread Connector, 1 x Female Internal Thread Connector, 4 x Male External Thread Connectors, 4 x Male Internal Thread Connectors