1-inch round rings that hold up to 175 sheets of paper. Heavier gauge vinyl, rings and materials used in construction. Rings mounted on the center of the binder as opposed to mounted on the bottom panel of the binder. Customize front, back and spine with transparent overlay. Designed for 8-1/2″ X 11″ pages with 2 interior pockets for holding loose pages. While priced about the same as any quality binder, these binders are designed to be durable and are not the “value” binders you find at many retailers. These products are proudly manufactured and creating jobs in the USA.