Okay, we've all used a public air cartridge at gas stations. And if you're like me, that air cartridge you had on your home compressor was of the same quality: junk. They leak and hiss air, are difficult to position properly, and getting more air into your tires instead of leaking out the sides is difficult and annoying. Not so with this Milton pneumatic chuck! This thing seals perfectly every time! That's really professional. Zero air leakage when filling. I daresay it is actually a pleasure to use! By far the best air cartridge I have ever used. It will most likely be the last I will ever buy. Worth the price. And last but not least: IT IS MADE IN THE USA! Buy it. Currently. 5 Stars!