Locking Tire Air Chucks Made From Durable Metal Alloy And Brass For Long-Lasting Use. Closed-Flow Design Prevents Leaks Until The Sleeve Engages The Valve Stem. Female 1/4" Npt Thread And Male 1/4" Quick Plug For Easy Attachment To Compressors, Hoses, Or Inflator Gauges. Hands-Free Operation Allows Fast, Safe Inflation Or Deflation. Suitable For Cars, Trucks, Buses, Motorcycles, Bicycles, And More.