Here is another multitool that you can take anywhere easily to get you unstuck. This 24-in-1 Multi-Tool Key has a stainless steel construction. It works as a hex wrench, stripping tool, wire cutter, box opener, ruler, bottle opener, angle finder, and a 1/4-inch drill drive.
This multitool weighs only 0.9oz. Not too expensive either.
[where to get it]