I was given a Classic and tried it on a key chain; the blade would
occasionally open, in my pocket. It really was not very useful
any way. It is also very fragile.

Here is close to what I use know.

http://www.swissarmy.com/MultiTools/Pages/Product.aspx?category=doityourself&product=53133&

I carry one that looks like above, however mine does not
have the tooth pick or tweezers. I wish I had these, also.
Mine is 1/2 inch thick but seems to lay flat in my pocket.
I occasionally use everything, except the file, which is
embedded on the small fake blade. Handle: red translucent.


I have used much bigger SAKs on my key chain, but this is a
good compromise.