High Quality Material: Made from high quality zinc alloy which makes the expandable keychain sturdier and more durable; the maximum load weight of this retractable keychain is about 150g or 8 keys. Retractable Wire Rope:Expandable Keychain is made of durable stainless steel wire rope that won't wear or tear. does not break easily. The steel wire cable can be extended up to 90cm, which makes it easy to unlock or access ID cards and make daily life much easier. Easy to use: Designed with a door hook spring loaded key for easy attachment to their belt loop, purse, backpack and more, extra convenience for your life or travel. Wide range of applications: Retractable key ring hook is designed for not only hang your keys, but the included clear badge holder also hangs ID cards, badges and more. The keychain is suitable for all industries, both men and women. Perfect for nurses, medical and office staff, security guards, teachers, employees, etc.