Quality and Durability: Made of carbon steel with brass plated on the surface, sturdy and durable. Easy to Use: This set of screws is easy to install, use a drill to drill a 5mm diameter hole, then you can install the 2 pieces from 2 sides, they can bind different items. Reusable: The threaded rod allows you to open and reattach the piece where needed by using a standard screwdriver. Widely Uses: The screw rod is suitable for holding and decorating documents, books, scrapbooking, photo albums, crafts, etc. Good material especially for leather crafts. Features: Material: Metal, Brass Plated. Type: Phillips Drive Head. Main Color: Brass. Size & Quantity: 30 sets of 5mm x 25mm. 30 sets: The screw post is composed of screws and top, they are assorted. 60 pieces in total.