Eyelet,circle in shape,which can also be called key button hole and shoe eyelet. Large-area of holes in the center assist the air flow freely and strings can go across it easily. Its mainly made by copper, polishing, plating orspray-paint is the necessary step before its put into use. It is widely used in all kinds of cloth, bag, vanity, shoe, cap, package, etc. The usage is not so complex. This kind of products uses the method of loosening bar to sew and nail for helping fasten it on raiments.