I'm starting a Community Garden and the hose we have had been cross-threaded (once or twice) and having a small budget and several hands using the hose. The life expectancy of the project was looking grim, especially for the hose. So I looked for something that would be easy for that struggle with lefty tighty and righty loosie or whatever it is they say to get things boggled up. I came across these quick release hose connections and the operation is so simple(for all but one, but that's another story) . They are made of brass or some type of metal, and they don't leak. There's no knobs, just a simple collar to slide back and release the hose.