ITEM NAME:Rivets Assortment Box of 120pcs Domed, Open End 3.2mm 4.0mm 5.0mm Description: Both the hat and mandrel are made of Aluminum. Aluminum Rivets are used to connect two pieces of material in a quick efficient way. Tubular, comprised of a hat and mandrel. The length of the mandrel is snapped off when installed. Aluminum rivets are among the most common aluminum fasteners. Aluminum should never be used with Stainless Steel, corrosion may occur. Specification: Material: Aluminum Size(Head Diameter x Head Length): 20pcs 3.2 x 6.4MM 20pcs 3.2 x 8MM 20pcs 3.2 x 10MM 20pcs 4.0 x 10MM 20pcs 4.0 x 16MM 20pcs 5.0 x 12MM Package Includes: 120 Pieces Rivets.Aluminum Rivets are used to connect two pieces of material in a quick efficient way. Aluminum rivets are among the most common aluminum fasteners. Aluminum should never be used with Stainless Steel, corrosion may occur.