Made of stainless steel, Sanrenmu 4113 SUX – SB No Lock Folding Knife looks just like a normal key but a bit thicker. Even though it’s small, you still have to keep it away from kids, this knife is pretty sharp. It’s an ideal everyday carry with semi-automatic quick opening makes it faster to unfold. There’s groove on the blade, making it more convenient for you to open it. Since there’s no security lock, please be careful when using it. It’s tiny, it’s cheap, and it’s functional, you can wear it on your keychain. [Buy It Here]