I bought one of these from Mike Politoski. Paid $6. Good deal. I keep this knife in my wallet, since I have a heavy latigo leather hand made wallet I designed myself. But this knife can fit in about anybody's wallet, assuming you have a bit of room in there.
Razor sharp! Ultra light. Works wonderfully, American made! Beautiful design, worthy of the Museum of Modern Art, IMO. I particularly like the turned metal on the frame/spring section. With this knife, the frame IS the spring. One thing to know: you must be careful with this knife. More so than with others, I think. The maker knows it too, since the packaging I received had instructions that were very clear that you must be extremely careful with this knife. I nipped myself two separate times when closing it before I figured out you absolutely must avoid any contact with the brass region. Pinch-point there! The instructions should have pointed this out! The knife blade edge did not cut me, the end of the blade did as my finger got between it and the brass part. The handle material, skimpy as it is, works well for what it is. All in all, a good knife for it's intended purpose, minimalism done right. Not for everyone, however. Like a firearm, know what you are doing, and it is perfectly safe. Don't know what you are doing, and you can be hurt.