AUTOMATIC LOCK-ON & PUSH BUTTON RELEASE - Just push on, and the chuck automatically locks onto the valve stem and begins inflating the tire. Push the release button to release the chuck from the valve stem.
QUICK & EASY - No need to hold the chuck in place on the valve stem.
1/4 NPT FEMALE THREAD - Installs on any 1/4 NPT male hose end or inflator.