Professional choice for easy tire inflation; excellent quality, made in Taiwan must have accessory for auto, heavy-equipment, truck shops; also available in straight-on style spring-loaded clip locks on to valve Stem - since you've got better things to do than hold a Chuck angled design reduces strain on valve Stem & hose; great for quick access stems; closed-type Chuck heavy-duty solid brass with galvanized steel Lock mechanism, female-threaded 1/4 inch npt inlet