About This REVOLUTIONARY LOCKING DESIGN: Six steel jaws lock onto any Schrader valve for a secure, hands-free connection. Experience the best locking air chuck for quick and reliable inflation every time. DURABLE MATERIALS AND SEAL: Hardened steel collet and spring-loaded TPU seal fit all standard Schrader valves. Inflate tires with or without the valve core using this lock on air chuck. HIGH PRESSURE CAPABILITY: Rated to 150 PSI, this locking air chuck is ideal for garage and industrial airline systems, auto and manual tire inflators, and portable pressure gauges. HEAVY-DUTY CONSTRUCTION: Built from steel to withstand daily use in busy tire shops, service bays, and garages. Features 1/4 in NPT threading for compatibility with most standard air hoses. VERSATILE FLOW OPTIONS: Available in open or closed flow styles. Closed flow must engage the tire valve for air to flow, making it perfect for direct compressor or air hose use.