Self-adhesive dividers with a twin-prong fastener transform standard end-tab or top-tab folders into divided or classification folders. Made of heavyweight 11 point manila stock dividers feature standard 2-3/4 slit punching. Dividers are hinge-slotted to fit around fasteners in folder. 1 twin-prong fastener with prongs on both sides of the divider adds more filing surfaces. Simply peel back the protective strip and press the adhesive hinged flap into the folder or binder.