
Properly designed tire changer. I had a very similar Husky brand air liner (HomeDepot) that would not open when the pressure between the tank and tire was within 30psi and required a lot of force on the tire stem to open the valve at any pressure. This air liner keeps the valve open as long as you continue to apply light pressure and balances the double and hoop without closing. After using this air chuck I wish I had fought others this long before I bought a Milton.