The quest is over - I have finally found a luggage strap that works and is easy to use. Most of the other straps need some fiddling about to tighten up (not only my onion, I took them to work and challenged colleagues, even shop kippers and not could do it with one hand). This one can be done exactly that way. Close the lock, and then tighten the strap with ONE hand. Brilliant. And it stays closed as to loosen it one needs to unlock it. Why, oh why did I not check PackSafe first. It would have saved me a lot of time (and money) on buying rubbish products. This one is really excellent...