Function: This Airline Hose Connector allows you to divide a single air line into two air supplies. Quick release couplers for use on the compressor side have a valve built in to shut off the air when changing between tools. Material: The Y connector is made of high-quality nickle plated iron, and the air line hose couplers are made of pure copper, strong and durable, not easy to rust, and has a long service life. Easy to Use: The airline hose compressor fittings is easy to use, just slide the collar back and insert the fitting, then slide the collar back to the position lock to allow the tool and airline to quickly connect or disconnect. Application: It is widely used to connect pneumatic devices and air hoses. Compatible with the standard range of adapters for air lines, air tools & compressors etc.