This 1.6 oz. tool, manufactured by the makers of the previously-reviewed Utili-Key, can fit on a key chain or in a coin purse, which is where I keep mine. I most often use it for tightening the tiny screws on my glasses, but the small #1 Phillips and flat, pliers, wire cutter/stripper, sheet shear and rule markings (bonus!) are all unbelievably useful at the frequent odd moments you need the right tool which is anywhere but near (particularly the pliers). I have yet to try to go through airport security with it, but the TSA says pliers/screwdrivers and “tools” less than 7 inches can be carried on.
A cool tool is anything useful that is superior to comparable items. If you think this tool is inferior suggest a better one. You are welcome to insult a tool, but comments containing insults to individual people will be deleted. Corrections of fact are always welcomed, if stated politely. Recommendations of better tools are dearly wanted and may be elevated to the front page.