Multi Purpose Application: Perfect for reinforcing various fabrics including pants, jackets, bags, belts, wallets, shoes and marine textiles, the set includes a clear case for organized storage Complete Fastener Collection: This 154 piece set includes 77 copper rivet pairs ( 47 units of 12mm×4mm×19mm and 30 units of 12mm×4mm×7mm) with 70 washers, featuring a # 9 design for leather crafting projects Simple Installation: Designed for easy use with basic tools place and hammer for secure fastening, making they ideal for all levels in leather crafting Head Design: The # 9 copper fasteners have a smooth, untextured face that adds refined detailing to both modern and vintage leather works Permanent Copper Build: Made from sturdy copper with protective qualities, these fasteners strong holding capacity for leather goods with their flush top construction