We will make your metal keychain being a one-sided with piece a basic back again, or we can easily engrave them over the back, or maybe allow it to be double sided.​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​