TRIANGLE PAPER CLIP 31MM is a small paper clip that normally use for thin document , 25mm with chromes silver and 100 pcs/box ( small box ),Paper clips usually have an oblong shape with straight sides, but may also be triangular or circular, or have more elaborate shapes. The most common material is steel or some other metal, but molded plastic is also used. Some other kinds of paper clips use a two-piece clamping system. Recent innovations include multi-colored plastic-coated paper clips and spring-fastened binder clips.