Per Josh: I first saw this type of chuck while traveling in Vietnam a few years ago. Throughout Vietnam you find tire repair stations along the roadside, and I was continually amazed to see them use large tire irons to manually install truck and car tires, often having 2 or 3 people stand on the tire sidewall while another person used the lever to pull those last few inches of bead over the rim. Then I watched as they attached the locking Schrader chuck onto the valve, placed the entire wheel around the corner of the building, and inflated it from the other side of the wall! When I inquired about the chuck with the shop owner he told me 'Expensive, but worth it!' as it allowed his employees to inflate truck tires to very high pressures from a safe distance. I wanted to bring that same simplicity to the market.