Want to carry a knife, but be less than obvious about it? The Boker Plus might be the knife for you.

With its a removable pocket clip, this knife can be carried just about anywhere, including in a wallet. It's about the thickness of three cards, but shorter. Its titanium liner and high performance 440C stainless steel blade make it pack a punch for such a small tool.

Here are the dimensions:

Closed length: 2 3/4" Blade length: 2 1/4" Overall length: 5" Weight: 1.1 oz

You can pick it up on Amazon.