This is a basic slide in ID card/badge holder with multiple options for attachment. Put it on your keyring, lanyard, or even add some elastic cord to affix the bade to a strap or other object. I orginally created this for the purpose of affixing the ID holder to an over-the-shoulder bag for easy ID card access (very useful for cruises). Print in whatever filament you want. I printed mine in PETG for durability as PLA might warp in heat if you are adding the elastic as in the photos. Make sure to print with supports. Happy printing!