Simple to install hammer-in design. To create a firm hold, use a hammer to hammer the washer in place and cut off the extra pin length with a plier, and then use a tool that flatten or round the tail. Some rivets and burrs may also require a hole punch to create a hole in the material before installation. You get 10pcs short copper rivets in 9mm x 3.3mm x14mm/0.35Inch x 0.13Inch x 0.55Inch (OD x Pin Dia. x H),10pcs long copper rivets in 9mm x 3.3mm x19mm/0.35Inch x 0.13Inch x 0.75Inch (OD x Pin Dia. x H), 20pcs copper burrs in 9mm x 3.3mm x1mm/0.35Inch x 0.13Inch x 0.039Inch ( ID x T) and 2pcs punch rivet tool in 10mm x 100mm/0.39Inch x 3.94Inch (Dia. x H). No quantity to satisfy your daily basic DIY or repair needs. 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 of the material being fastened while the washer and tail are hammered down to fix the rivet in place to offer a sturdy and reliable fastening solution for a wide range of applications. The solid rivet set is made of copper, which has resistance, wear resistance, long-lasting durability, and ductility feature and is not easy to break. The matching washers can make installation much tighter for ensuring long-lasting strength and support. Use these rivets for crafting, repairing, or even decorating. They are perfect for leatherwork, handmade crafts, and many other applications, like making and repairing belts, bags, keychains, straps, purses, jeans, shoes, and other leather ornaments., Weight: 0.4299014109 Pounds, Manufacturer: Tuidzljd