Description: - Made of heat treated hardened steel for strength and durability. - Zinc plated finish for rust and erosion resistance. - Spring loaded quick release couplers which should be used on the compressor so that the air is contained when the air tool is disconnected. - When using the coupler(s) slide back the sleeve, push in the connector and then slide back the sleeve fully to lock in the connector. - Enables tools and airlines to be quickly connected / disconnected. - Reduces accidental airline disconnection. - Materials: Stainless Steel