The Utility Card really is the all-in-one tool in a simple portable card! It's a ruler, a letter opener, a screwdriver, a can opener, and a bottle opener just to name a few of the things this card can do for you. The Utility Card comes with a near indestructible metal cable ring to lock it in place when not in use and also acts as a keyring so you can attach it to your pants, your backpack, your bag, your keys, anywhere! To slide it out of the cover, twist the lock on the metal cable until it pops open. Pull it through the hole and slide out the Utility Card. The truly all-in-one tool is just a few twists away.