Constructed from heat-treated hardened steel with a copper-plated , this quick coupling compressed air set is robust, rust-, and -proof, ensuring a and reliable connection for all your pneumatic needs.Featuring airtight design, each 1/4 inch quick connect coupling has a built-in valve that automatically shuts off the air when switching tools, enhancing safety and increasing efficiency during the tool change processes.Ease of use is with our quick connect system for air compressors; simply pull back the collar, insert the plug, and release to lock securely. Detach with a backward slide of the ring, emphasizing simplicity and productivity in pneumatic operations.This set includes versatile fittings to suit configurations: 1 large female connector with female thread, 1 with male thread; 4 small male connectors, and 4 small female connectors, all tailored for 1/4 inch standard air hoses.perfect for a multitude of applications, this 1/4 inch quick coupling seamlessly fits pneumatic tools, air compressors, and automotive systems, minimizing accidental disconnections and streamlining tool itions. The actual product may have slight color differences or differences, which does not affect use.Colour:goldMaterial:copper Package Contents:1 x connector with female thread1 x connector with male thread4 x small connectors with internal thread4 x small female connectors with external thread Only the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.