It's a shame I only just found it now. Would have been a great Xmas present. It measures 5.5cm in length so it's tiny. They also do one with Scissors (S4), but the Knife would do everything the scissors would.
I actually came across indirectly from Jeff Atwoods latest post about what is on his Keychain this year.
For the record, my keychain is boring.
- Liverpool FC Badge
- The Stig
- And soon to be a Leatherman Squirt P4