We all need a tool like this in the end...I found this one from TRACKER in a local skate shop...What's essential to me is the fact that it is quite compact and still very useful...It's completely made from metal and has a chrome finish...
The tool consists out of 3 pieces that fit snugly into each other...2 components have rubber O-rings that provide enough friction so that the tool doesn't fall apart when being in compact mode...
When assembled, you'll have the right tool at hand...easy to use...and easy to carry around in the pocket afterwards...
Final: I used the tool for some time now and found out that it is not that usefull...it's good for those emergancy adjustments but not for thourough use...sometimes, depending on the wheel type, you can hardly reach the wheelnut...