I returned it today using an awesome Amazon locker for the free shipping.  This was a replacement for an S-516 that also had to be returned to Amazon. I was looking for a commercial quality inflator with a gauge that was made in USA. It is heavy and looks great but the dual head air chuck just blows the air straight through it. I returned the one and really wanted this inflator so I ordered it again but both had the same faulty dual head chuck. Milton's people on top must have thought they could cut expenses with a cheaper gasket inside, probably a cheap fix.