This is a modified money clip that fits well on the back of a Sansa Clip Zip as a replacement for the stock clip if it breaks. There are two files, one has thicker teeth than the other that allows it to grip onto thinner surfaces such as the bottom of a cotton tee shirt, while the other has thinner teeth that allow it to grip thicker surfaces such as a belt or thick denim. Thanks to TheNewHobbyist for their original money clip design, this is only a slight remix of his design to make it more appropriate for this application.I used a dremel to grind away the bumps and smooth out the back and then I used several different pieces of sandpaper to rough up the back of both the Clip Zip and the Clip and attached them with a plastic adhesive.