... plain. Certificate: ISO9001, ISO14001 Features: Nonstandard Round Head Steel Rivet with Ball End 1)Material:stainless steel, aluminum, copper, carbon steel2)Surface Finish:plain ... as per your need.3) Rivet shape: with one welding point in the round head, ball end.3) Production process: CNC ... responsible QC, Engineers and after sale worker to deal with such things.In case this thing happened, we will ...