Abstract: A fastener for paper and the like is integrally molded of a plastic material and comprises hingedly interconnected first and second plate members, each having a mating surface thereon, and a wedge-shaped prong which extends from the mating surface of the first plate member. The prong is receivable in frictional interengagement in a slot in the second plate member to detachably maintain the plate members in the closed positions thereof, wherein the abutting surfaces thereof are in mating relation. One or a plurality of sheets of paper or the like interposed between the plate members are penetrated by the prong when the plate members are in the closed positions thereof to secure the sheets in the fastener.