- Compact paper clamp, but with a large capacity. *For keeping loose documents together. *For marking and archiving complete files in ring binders or folders or for hanging documents on a notice board. *Open the paper clamp by folding the metal brackets back and squeezing them together, close the clamp by releasing the brackets and folding them forward if necessary. *The metal brackets can be removed, so that only the clamp remains on the document and the brackets do not take up any extra space.