The screw buckle is mainly made of copper, iron and other materials. The surface is electroplated. It is generally used with chains and open rings. It is mainly used for toy accessories, craft jewelry accessories, gift accessories, etc. as pendants or decorations; There is a nut for locking at the opening, which is beautiful and safe. The screw buckle made by Obi Accessories Co., Ltd. has the characteristics of being difficult to rust and flexible.