I used to buy quite a few of these keychains. The ability to just buckle the pants on is the main reason I got this. But unfortunately, like others, the tiny cog will eventually come loose, and it looks like the worst-case scenario is that it will. I thought I lost my car key when it happened, luckily it was still in the car. I couldn't find the missing screw so it's useless now. I think the design is flawed as the screw is the weakest link.