Ideal start pack of quick release fittings compatible with PCL, Vertex, Airflow, Rectus 19 fittings etc. Made of heat-treated, hardened steel for strength and durability, with a zinc-plated finish for rust and corrosion resistance. Spring-loaded couplers shut off air when changing tools. Includes 1 x Female Quick Release Coupler with 1/4" BSP Male Thread, 1 x Female Quick Release Coupler with 1/4" BSP Female Thread, 1 x Female Quick Release Coupler with 3/8" BSP Male Thread, 2 x Male Fitting with 1/4" BSP Male Thread, 2 x Male Fitting with 1/4" BSP Female Thread, 1 x Male Fitting with 3/8" BSP Male Thread, 1 x Male Fitting with 3/8" BSP Female Thread, and 3 x Male Fittings for 6mm, 8mm, and 10mm hose.