I was going to clip it to my car keys, but I was concerned that the color wheels would get damaged. I have clipped it to my purse and I have found it to be excellent for determining if something coordinates. Is it pricey? Yes. But if you can afford it, it is worth having if you really want to coordinate your colors. Yes I have a color fan, but I’m concerned with taking that shopping and losing it. This is a better solution! You can tell immediately if you hold it up against a color whether that color coordinates with your colors. I love it.
I've been keeping this on my car keychain, so it moves around a lot and its stayed together very well. I like that its lightweight and I can take it anywhere with me. I've already used it to color match a shirt. It's exactly what I needed.