
Universal style couplings, also known as "Chicago Couplings", are most commonly used on hose lines connecting pneumatic tools to a compressed air source. Firmly pressing one coupler to another and twisting seals the connection. Safety clips prevent accidental disconnection during use. A convenient quick connect system to mate varying diameters of hose as all sizes up to 1 inch are interchangeable. Sizes over 1 inch have a four lug design.