I have one in my nightstand for eyeglass repair. The first one broke on the key ring, they sent me a new one.

I rubbed it back an forth on a stone and got the edge of the knife sharper. It will open the tape on boxes etc.

Like a broken drill bit (it still makes a hole, just more work) it will do in a pinch for small chores. Might be good when there is never a reason to carry a knife.