Worked great for what I needed it for. Build a smoke machine and do something to seal off the smoke flow. Got this coupler because it fits an old air mattress air pump we had. And then I found an adapter to reduce the size of the hose connector. (I know you should see the pics) It's powered by one of those power supplies, so it's portable. As long as I have a 12 volt battery handy, I can go and work anywhere. The attached photos show this clutch connected to an air pump. 2nd photo is my smokeβ¦