... can be hard enamel, sand blasting, soft enamel, imitation enamel 8. Plating: nickel plating, also can be gold, silver, brass, cooper ... , antique gold, antique silver9. Attachment: can with pin, clasp, butterfly clutch10. Usage: souvenir, promotion, retailThis series of artworks ... wrist,USB cover and so on . custom metal mouse badge/pin badge