Detailed Product Description Blind Rivet.Metric size: Diameter :3 to 5mm.Length: 5 to 30mm. Inch size:Diameter:1/8 to 1/4-inchLength:3/16 to 2 inchesMaterial: carbon steel and aluminum.Surface: plain, zinc plated(cr6/cr3), yellow zinc plated, black zinc plated, nickel plated, brass plated..