The simple concept of a screw driver on your key ring is not new. Nobody has made a high quality key ring screwdriver for the last 10 years, until now. They are constructed of heat treated, blackened steel.
They are so simple, there's not much more to say about them.
(One Phillips and One Straight Blade)
It is compact and versatile. If you find your grip a bit weak to turn it and break loose, it will let you attach a ratchet (not included) to help.
Each of the 7 people to whom I gave one of these was thrilled.
These things are so handy that friends are always asking "where'd you get it"? So I just bought a whole bunch more so I can just give them a set next time that they ask, and have one extra for when I invariably lose my keys. That's how useful this is.