This thing came in such a tiny box I didn't even know what it was until I got inside. They really crammed everything together! Of course, after assembling it with a cartridge, it is relatively long, but still less than I expected. One of the pieces appeared to be double perforated, but ended up in the final product anyway. It comes with two identical air fittings that look a bit like ARO fittings but aren't. I found this connector on Alibaba but that means it's probably just a Chinese connector. If they had come with this and a standard industrial plug (probably what they intended, considering there are two of the same kind you wouldn't need both) then everything would be fine, but as it is I had to add my own. The tool seemed to work reasonably well in initial testing with rapid swings, but we'll see how it holds up over longer periods of heavy use.