Tool Logic Credit Card Companion with Lens and Compass is an ultra-compact multi-tool the size of a card, featuring a 2” serrated blade, combination can/bottle opener, awl, 8x power lens and compass, tweezers, toothpick, and in/cm ruler. You can get it from Amazon.
The Boker Plus Credit Card Knife, when folded, disappears discreetly into your wallet. It’s extremely lightweight, with the plate made out of titanium, as well as the milled slots along the board and the blade. Dimensions: length of 7.1 cm, a width of 3.5 cm, thickness of just 3 mm, weight 35 g. Blade Material: 440C, Handle Material: G10, Titanium. Available at Amazon.
A mini sized knife and fork, made out of hardened stainless steel. They are stored inside a Clear Plexiglass sleeve, the size of a credit card, perfect for holding in your wallet. The Razolution Card Cutlery is made in Solingen, Germany. You can get it from Amazon.