For those complaining about the quick change adapter ... the quick change adapter is intended so that you can connect & disconnect this blow gun to your air hose more quickly. Its not intended to allow you to quickly change the tip you want to use with this blow gun. That is why there is only one of them in the kit instead of 3 of them and why the tips won't stay secured to the blow gun if you try to connect it using the quick-connect.
It worked great for cleaning the sheetrock dust out of my shopvac filter. The only problem I had is the rivet in the hinge for the on/off lever came out when I was using it like a hammer because I was too lazy to go get a hammer. I ended up getting a hammer so I could reset the rivet and now it works fine and I think it will last a long time as long as it doesn't get used as a hammer. :-)