Disc compatible chuck rated for 300+ PSI without blowing off;Full Stainless steel construction that’s guaranteed for 25 years;Uses the proprietary 254 gasket (not backwards compatible with old hiro);Adjustable gasket pre-load allows for a customized fit on any valve as well as compensates for gasket wear;Male Schrader thread fits into any Schrader chuck, or use SILCA’s Thread-On Schrader Adapter to fit to bare hose