Item Type: Book Binding ScrewMaterial: Brass .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1High Hardness: The nickel coating is uniform and dense, with high hardness, and the coating can be heat treated to improve its hardness. 2Brass Material: DIY leather rivets are made of brass material, the surfaces are flat and smoother, no burrs, excellent workmanship, sturdy and durable. 3Curved Surfaces Design: Book binding screw adopts curved surfaces design, smoother, excellent workmanship, beautiful and durable. 4Electroplating Treatment: Metal nail rivet studs adopts electroplating treatment, which is not easy to fade and paint, so that the surfaces of the product is bright and clean as new. 5200 Sets: There are a total of 200 sets of metal nail rivet studs, a large number to meet your use needs, can be used for a long time.