... enamel 8. Plating: nickel plating, also can be gold, silver, brass, cooper, antique gold, antique silver9. Attachment: can with pin, clasp, butterfly ... , carabiner, bottle opener, photo frames, key cover, keychain, luggage tags, mouse pads, fridge magnet, wrist bands, mug ,cup coaster, car mats ... straps, watch wrist,USB cover and so on . custom metal mouse badge/pin badge