I needed a way to flatten out and clamp a piece of thin radiochromic (UV responsive) film for examination with a microscope so I made these simple little clips to hold it as flat as possible between two standard microscope slides. 

Basically useful if you need a way to firmly sandwich something thin between two slides.

They stand up vertically as well so they can be nicely arranged and organized in a box - particularly useful for this application where the films need to be keeps in a dark box after exposure.