You'll probably attach聽the聽 multi-tool to your key ring, then聽forget about it. But you'll be happy to have it when you need it.聽聽聽
About as small as a key, it sits unobtrusively on a聽ring, but has聽10 different tools,聽including multiple screwdrivers, rulers, wrenches, a file, and,聽most importantly, a bottle opener.
$10,