The Case-it Dual-101 binder is two binders that zipper into one handy, easy to carry binder. Each Dual-101 offers two sets of 1 1/2 Inch D-Slant metal rings, at standard 3-ring measures. Each set of rings includes Velcro dividers to secure contents in place. You can arrange it any way you want, keep all your subjects in one binder. There's even an inside pocket for a calculator and a removable zippered pencil pouch. An additional zippered front pocket is great for keeping some cash, writing instruments, your id, etc. The Dual-101 comes with a unique angled zipper design along with a handle and shoulder strap for easy mobility. The Dual-101, like all of Case-it's binders, uses Kraft board instead of PE board to give its binders a firm, stiff shape that won't buckle or warp. The spine is specially designed so that your binder can lay flat when open, making it easier to add or take papers out, and to take notes in. Case-it knows that our customers depend on our binders every day, throughout the year. As such, our products come with a 1 year warranty. Original proof of purchase is needed. Note: This warranty does not cover any problem that is caused by normal wear and tear, abuse, neglect, heat, humidity, maintenance, or modification of the product. If it is determined that the problem is a result of any of the above, the warranty will become null and void. The original purchase receipt is required for all warrantied items. Please email the below information to customer.service@caseit.com if you would like to submit a warranty claim. Proof of purchase Item stock # and color Image of white tag with UPC (usually located inside) Image of the damaged part Replacement ship to address