General description Made of high-quality carbon steel, these nickel-plated book screws are hard, sturdy, and durable, ensuring a long service life. They are designed to be easy to use and are suitable for a variety of applications, including holding and decorating documents, books, scrapbooks, and photo albums, making them especially useful for leather crafts. Technical specifications Material: Carbon steel with nickel plating Dimensions: 5mm x 15mm Quantity: 30 screws and 30 tops (total 60 pieces) Installation Drill a 5mm diameter hole for installation. Install the two pieces on either side to connect different items. Usage Ideal for decoration, furniture repair, and DIY projects. Useful for office furniture and household appliances as emergency parts. Can be employed in vehicle auto repair and mechanical maintenance.