Product description Compact and lightweight: The diameter of this retractable lanyard is 4 cm. It will be easier to wear and won't weigh down your collar like bulky badge reels Resistant Cord: This retractable keychain uses Dyneema cord inside. It is twice as strong as carbon fiber, making it the strongest fiber in the world. Wide Application: Suitable for any industry and anyone, you can use it as a name tag holder or a retractable key chain. Ideal for nurses, medical and office personnel, teachers, students, maintenance personnel, security personnel, factory workers, employees, government, police and more. Note:1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding.2. The color may vary due to different monitors, please understand. Note:Hello, please pay attention to your delivery address when purchasing products. If your receiving information (such as: name, street, house number, doorbell/email without name, etc. is incorrect, the order will not be delivered correctly.)