Plews 17-398 Dual Locking Chuck Extra long, dual foot, locking air chuck for hard to reach inner duals Straight-on head features a threaded, deep well lock that holds chuck securely in place when tilted; 12 inches long overall Chrome plated, all metal construction built to withstand the toughest home garage or shop use Not for use with inflator gauges; chuck has it's own shut-off valve and will not work with inflator gauges which are intended to regulate the air flow 1/4-18 female NPT inlet threads