These are copper (not copper plated base metal) solid rivets. Copper rivets and fasteners are often utilized in manufacturing applications due to their strength after cold-heading, corrosion resistance, and antimicrobial properties. We increases the strength of our copper products by the cold forming process, making it a perfect fastener for your requirements. Due to its decorative appeal, copper is a perfect material for manufacturing functional items, and its conductivity makes it perfect for use in electrical applications. Material: Copper alloy Shank Diameter(D): 2mm(5/64 inch) Shank Length(L): 10mm(25/64 inch) Head Diameter(A): 3.1mm(1/8 inch) Head Thickness(B): 1.6mm(1/16 inch) Color: Copper Tone Net Weight: 75g Package Content: 300pcs x Copper alloy Solid Rivet Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.