PITAKA Aramidcore Carbon Ultrathin Detachable Magnetic Credit Card Holder Wallet Multifunction and Practical - store all cards in one place (from credit cards to loyalty cards and other international standard ISO/IEC7810 ID-1 format cards). Convenient and Smart - with magnetic mechanism design that you can easily access the cards you need and place back with extreme comfort and ease. Modular Design - it can be separated into 4 independent modules and randomly combined together by magnetic attraction (no mechanical parts) so as to keep as many cards as you want. Hi-tech and Quality Raw Material - made of premium Aramidcore carbon fiber which makes this product lightweight, strong, durable with great protection again scratch and bumps. Be Perfectly Used for Chip Cards but Not Magnetic Strip Cards - The magnets embedded in this card holder may demagnetize your Magnetic Strip Cards, but won't affect Chip Cards. So please don't use this product to hold your magnetic strip card.