[What You Get] - You will get 10pcs copper rivets in 10mm x 3.3mm x 14mm/0.39\" x 0.13\" x 0.55\" (OD*Pin Dia.*H) and 10pcs copper burrs in 10mm x 3mm x 0.9mm/0.39\" x 0.12\" x 0.035\" (OD*ID*T). No more or less quantity, to meet your daily basic DIY or repair needs. [Material] - The solid rivet set is made of copper, which has corrosion resistance, wear resistance, long-lasting durability and toughness property and is not easy to break. The matching washers can make the installation much tighter to ensure long-lasting strength and support. [Fastening Function] - Copper rivets and burrs have a cylindrical shape with a head at one end and a tail at the other. The head sits on the surface of the material being fastened while the washer and tail are hammered down to secure the rivet in place, providing a sturdy and reliable fastening solution for a wide range of applications. [Easy Installation] - Easy to install hammer-in design. To create a firm hold, use a hammer to hammer the washer into place and cut off the extra pin length with pliers, then use a tool to flatten or round the tail. Some rivets and burrs may also require a hole punch to create a hole in the material before installation. (Installation tools not included.) [Versatile Applications] - Use these rivets to make, repair or even decorate. They are perfect for leather work, handmade crafts and many other applications, such as making and repairing belts, bags, key rings, straps, wallets, jeans, shoes and other leather ornaments.