The innovative people at SwissTech have created something truly amazing. Taking different screwdriver heads and placing 8 of them around on a sphere they have created the Screwball.
You can use any of the screwdriver bits by pulling one towards the end of the ball and it snaps into position until your done with it. The Screwball is designed to hang off a key chain so it's always there for you, and believe me it's always there when I need it, and when you do it just clips off your key ring and it ready for use.
Another good thing about this tool is that it's made of high impact plastic, I have accidentally dropped it several times and no harm seems to come to it. If you're like me and need screwdriver when you least expect it but don't feel like carrying the real thing, then grab one of these cause you'd be a Screwball if you didn't.