I was looking around the shop for something to do and I spied this. It was given as a Christmas gift several years ago, and it has been hanging on the wall since. It is a SKIL Combination Standard / Metric wrench. I’m sure it would work on loose bolts, but I would be concerned with the flimsy slide adjuster, and it only provides grip on two sides of a bolt unless the bolt is 1” or 25mm. A Crescent wrench feels studier than this. So this is my most useless tool. Sure I have other tools that don’t get used much, (A small tube bender, and water heater element socket) these were purchased for only one use, but at least these were used once, and may have a future use.