I saw this idea in a catalog and I figured I could make one cheaper then what they were selling it for. I cut the coiled air hose in half and added clamp on chucks to both ends. I used a brass tee to connect to a gauged inflator I bought at WalMart. Now I can inflate or deflate two tires at once. The really nice thing is that you can equalize the pressure in both tires in a single step. A good thing to have if you're running lockers.