Duo-Tang

Brand name for paper folders made of cardstock paper

Duo-Tang was a brand name for paper folders made of cardstock paper. They are used to bind multiple sheets of paper by bending embedded brass fasteners through the holes of the paper and folding them down to keep them in place. Some models have three teeth on the fastener, and some have six. They could be different colours such as blue, green, red, orange, yellow and black. They were often used as an organization tool for multiple pages of one subject, chiefly by elementary school students.

This keyword could refer to multiple things. Here are some suggestions: