Prestacycle's Pro Schrader Head features a patented auto-lock mechanism that securely attaches to Schrader valves without pulling or twisting. It forms a seal and allows for two-way flow and pressure readings. The easy-grip sides and side button ensure full release of the connection, providing an instant low-loss disconnect to maintain accurate tire pressure.Patented auto lock with gentle push button releaseSteel / Alloy construction is pro shop durablePerfect for bicycles and vehicles of all kindsWill not harm TPI valvesSteel / Alloy construction is pro shop durable"L" design works on most automotive wheelsHigh flow capable Prestacycle Pro Schraeder Head Pump Part UPC: 689466922899