The STEELMAN 60121 1/2-Inch Industrial Brass Quick Disconnect Plug with 1/2-Inch Male NPT Threads 10-Pack is the answer for any workshop or automotive garage that uses multiple air tools. Each plug is constructed of solid brass and is naturally rust and corrosion resistant so condensation in water lines won’t cause premature failure. The quick-disconnect end is sized to fit 1/2-inch couplers and fittings and the threaded 1/2-inch MPT end threads easily into tools for fast and simple setup. To make connections easier the hex shaped body of the plugs can be easily tightened onto tools with any adjustable wrench or an appropriately sized combination or end wrench.