Protect your set with this Magnetic Trading Card Holder by Atrix. Featuring a magnetic closure, this acrylic card holder is perfect for preserving Pokémon, Magic: The Gathering, Dungeons & Dragons, or sports trading cards. If you're a trading card collector, then this is the holder you're looking for! Protect your set with this Magnetic Trading Card Holder by Atrix. Featuring a magnetic closure, this acrylic card holder is perfect for preserving Pokémon, Magic: The Gathering, Dungeons & Dragons, or sports trading cards. If you're a trading card collector, then this is the holder you're looking for! A penny sleeve may not fit due to a tight enclosure.