1. Size of the extendable keychain: length 16 cm/6.3 inches, width 4 cm/1.58 inches, steel cable 64 cm/25 inches, thickness 1.2 cm/0.47 inches. 2. High quality and portable: These ID card holders are made of a metal key chain and climbing hook, as well as a round plastic roller case. They have a strong load-bearing capacity and are small in volume, making them easy to remove and store in your pockets or hang on your belt. 3. Robust and durable: Keep your key chain or ID card access cards handy. Ideal for quick, loss-free access to keys, employee badges, bus passes, access cards, etc. The robust extendable key ring holds all your keys. More practical, flexible, functional, and organized than a chain or lanyard. The appropriate length of 64 cm allows you to guide the key to the lock without any obstruction. 4. Wide range of applications: Helpful for tradesmen, doctors, nurses, emergency services, firefighters, etc. Practical for various outdoor activities such as hiking, fishing, or as a ski lift pass holder. The retractable key chain is also ideal for seniors or people who tend to misplace things.