While I expected less than perfect workmanship, my product did what I didn't expect; A LEAK! The leak was in the thread. I've used several different fittings from different manufacturers, as well as a plethora of PTFE tape (threaded) with no success. I think this is due to the threads being too fine or simply to very poor workmanship. This is annoying but useful. That explains why I gave 3 stars. Looks like I might have gotten a lemon or the people surfing never got theirs on the air. Here are the pros and cons: PROS: Low price, lots of extras, shape feels solid, adjustable air valve, ball bearings where the support pad goes, lots of RPM for what it's supposed to be used for CONS: Leaks, but heavy then yes, stock is not sealed (easily replaceable), trigger is uncomfortable, trigger is all or nothing (not variable. Expected). This is for headlights or small areas. Don't buy it to make a whole car or whatever and I think you'll be happy as long as yours doesn't leak. Please click the Helpful button if you found this review helpful.