Self-adhesive dividers with twin-prong fastener transform standard end tab or top tab folders into divided or classification folders. Made of 11 point heavyweight manila stock. Dividers feature standard 2-3/4" slit punching. 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. SFI Certified.