Material: Metal Feature: Simple snap closure book binder rings installation easy and fast. Without using too much force when closing, its clasp closure tightly enough to keep the pages of your scrapbook from falling off. Book binder hooks is not only for scrapbooks or books, but also for shower curtains, loose-leaf, organizing tools, key rings, photos, ang many other proper applications. Color: May vary to the stock. Customer may not choose. Size: 3cm dia x 3mm thick