The UltraPRO 100 count Diamond Corner Box is one of UltraPRO's newest and most innovative designs. The 2-piece box features a slide-in design with the corners beveled out to protect the corners of cards. In addition, the lid and base feature a simple but effective locking mechanism to hold the box securely closed. Sized to hold 100 cards, the box is perfect for base card sets or archiving your star cards.