The Ultra PRO PKM Elite Series Arceus Alcove Flip Box deck box will securely store up to 100 cards (Pokémon, Yu-Gi-Oh!, MTG, or any TCG with standard-sized cards) protected by sleeves. The lid is designed to self-lock using magnets upon closing, thereby ensuring your cards are safe from falling out even if the box is turned upside down. Ultra PRO Alcove Flip Deck Boxes are made of sturdy, high-quality material, covered in soft faux leather, and are easy to maintain.