The material is brass. You can connect chains and parts to the hoop part. After threading the parts and connecting them, bend the end about 5 mm with a round yam, pass it through the looped part, and secure it. *As this is an accessory, the color may be changed to reflect changes in fashion. Also, during the processing process, color shading may occur without prior notice. Please note. (Some parts may differ in color from other parts.)