Premium Pressboard binder features a twin-prong style fastener to neatly bind and cover presentations, reports, manuscripts, proposals or other documents that require loose-leaf style binding. Two-piece cover compresses letter-size material tightly to reduce bulk. 8-1/2" fastener compressor holds your report tightly together without damaging the document or the binder hinge. 3" capacity binder is made of heavy-duty, 25 point pressboard stock that is coated to resist moisture. Binder includes a metal twin-prong fastener with compressor on the binding edge side and is made with a high percentage of recycled material. Fastener dimensions are center-to-center (C-C).