AutoEC Open Flow Air Chuck with Clip, Tire Inflator Lock-on Air Chuck - Tire Inflator Valve Connector - 6mm 1/4&rsquo;&rsquo; Brass Well-made --- Solid brass construction and chrome plating for durability and resistance to corrosion, easy clean up and good looks. The spring is easy to depress and strong enough to stay in place. Precise Design --- Hands free during inflation, stays clipped to stem without falling off or leaking. Open Air Flow --- Air passes through freely and work without a valve core. Easy to Use --- You just press down the lock clip, push or twist the air chuck into the valve stem until it is clamped, release the lock clip. Universal Fitment --- Maximum pressure rating of 150 psi, barbed fitting for 1/4" ID air lines., compatible with 6mm bore hose, suitable for vehicle tire inflator, such as car and truck.