These triangular book corner protectors not only protect book corners from damaging, but also serve as a retro beautiful decoration. Metal corners are widely used for craft and DIY projects such as making scrapbook, photo album, menus, jewelry boxes, wallets, cards, and so on. It's an useful accessory for your daily life.SpecificationMaterial: IronSize: 20x20mm / 0.79x0.79 inchInner height: 5 mmPackage list: 100 pcs Metal Book Corners(50 pcs for each colorAdvantageMetal book corners are made of quality iron, which is rust-proof, durable, anti-corrosion, round and smooth, flat and burr-free, will not make scratches on the book.Instruction Just insert them into the book cover and press the metal book corners to fasten it firmly to the book for a great look and good protection.NOTE:  Our store has photo corners of different sizes, styles, and colors to choose from.