The OEM Cardinal ClearVue Locking Slant-D Binder CRD26350 is designed for durability and functionality. It features a unique XtraLife material that prevents sticking to cover title inserts or stored materials, including photos and laser prints. This binder is made from a stronger, PVC-free polyolefin cover material that is environmentally friendly and cold-crack tested to negative 50 degrees Fahrenheit. The locking Slant-D rings hold 25 percent more letter-size material than standard round rings, accommodating up to 1,100 sheets with a 5-ring capacity. Additionally, horizontal pockets on the inside front and back covers provide extra storage for loose papers.