A stationery fastening device made of thin, soft metal, with a round head and a flat, split shank, which is spread after insertion in a hole in a stack of pages, in much the same way as a cotter pin or a split rivet.
Any similar stationery fastening device.
A stationery fastener that is inserted into punched holes in a stack of paper before being bent to secure them.
A metal fastener with two tines, the ends of which project through an object being fastened and are bent back to hold it in place.