2-Card Holder: Inner size: 8.5cm H by 5.5cm W Accommodate 2 standard credit cards of 8.5 x 5.5 cm. Ideal for IDs, drivers licenses, badges, passes, etc. DO NOT FIT THICKER CARDS!Quick Access: Practical thumb slot allows you to slide card in/out effortlessly with just one finger. Handy top-load design keeps card tightly in place to stop it from falling out.Heavy Duty: Made of sturdy poly-carbonate material which is resistant to heat, wear or breaking. Effectively protect your cards from damage, bending or getting lost.Crystal Clear: Well-built for maximal transparency which presents you with super clear visual effect. Easy to read or scan your cards without removing the card sleeve.Easy to Carry: Handy to attach it to a retractable badge reel, lanyard or strap through the middle slot. And the 2 side holes are punched for strings, threads or keychains.