Probably the most used tool in my office is a set of tiny screwdrivers sometimes sold as precision screwdrivers. Hardly a week goes by when they aren’t needed to disassemble or repair a gizmo or tool.
[Please see the more recently-reviewed Husky 8-in-1.]
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.