I have the PS4 on my keyring. It is gratifyingly useful and versatile. I generally also carry a Wave (not quite EDC) in a holster with a bit kit and a 4" crescent wrench. This rig saves steps and time for casual jobs; if a lot of wrenching needs to be done,I will hunt down a real tool.

Knives, flashlights, multitools, and firearms - what about ice cream and chocolate?