The ‘D’ shaped nickel plated clip allows for easy filing and less strain on the punched holes (as compared to ‘O’ shaped clips). Nickel plating allows for long life of the clip and significantly reduces the clip’s tendency to rust. The clip comes with a nickel plated gripper lock that presses the pages downwards and holds them together. The Cover Material is made from FSC Certified (Forest Stewardship Council), environmentally friendly textured paper pasted on hard board which gives the ring binder a long shelf life.