I originally had a collapsible wrench in the shape of "+”. Until recently it worked fine for the couple of times I used it. Nut was stubborn. I put quite a lot of force on it with my hand and then the key broke. So many poor quality metal wrenches are made in China these days. Ken Tool is based in Akron, Ohio. Although this box wrench is made in China, it is designed, engineered and quality controlled in the USA. You have to state that it is high quality metal as in my case this wrench was able to get the job done without a click. The telescopic function is good. The only thing that confuses me is that it doesn't close. However, this only affects portability and does not affect rigidity in use.