... : copper or iron 2) orther shape: O ring, D ring, square ring and so on. 3) Thickness from 1.8MM to 5MM ... (jeans button, snap button, sewing button, eyelet, rivet ), zipper puller, stopper/cord end, buckles (belt buckle, shoes buckle and bags buckle ... )35000272640×25×2338mm(5mm thickness)10000222140×25×23Factory view: Handbag O ring buckle