Evike.com Steel Black CNC Credit Card Sized Multi-Tool

"Very small but useful. Fits in my wallet very well. I recommend putting it in the leather pouch it comes with so it doesn’t ruin your wallet.

"works good fits in my wallet pretty well. (i use a DGK tri fold)

"Interesting little tool. I don't suggest actually purchasing this as a real multi-tool, but it's neat to have if you need to reach that free shipping requirement, or as a nice wallet filler.

Pros:
Very strong, one-piece steel material.
Very sturdy and heavy. Nice bonus if you like little weight to your wallet.
Comes with protective sleeve.
Black matte finish is great if you don't like super-shiny surfaces.
Metric ruler is surprisingly useful if you need a straight edge to draw with, or measure small parts. Probably my favorite use of this product.
Some of the tools are actually pretty decent, such as the saw edge, bottle cap opener, screwdriver head, and wrench tools.

Cons:
Knife edge comes dull, so it's not really going to cut anything unless you sharpen it.
Both the saw edge and the end of the knife edge are very sharp. This could be a problem when using other tools, so be careful not to poke yourself.
Possibly won't fit very well in some smaller wallets or money clips. I use a tri-fold / traveler's wallet, so it fits well.
Sleeve is made of a cheap material, and it's best to keep the saw edge inside the sleeve and not poking out of it, as it might damage your wallet.