Item Type: Book Binding Screw_x000D_ Material: Brass 1Uniform Coating: The nickel coating is uniform and dense, and the coating with higher hardness can be heat treated to improve its hardness. 2Electroplating Appearance: The appearance of Chicago screws is electroplated, which is not easy to fade and paint, so that the appearance of the product is bright and clean. 3Hard and Thick: The rivets are glossy and delicate, hard and thick, the appearance is oil free, light and portable. 4Excellent Workmanship: Brass curved ledger nails, excellent workmanship, beautiful and durable, accessories, outdoor convenience. 5Brass Material: Leather rivet kit is made of brass material, the appearance is glossy and burr free, strong and durable.200 x BookBindingScrew (Sets)