Treadmill Safety Key: This safety keys will work easily and quickly on most treadmills, and can work easily. Wide Compatible: Treadmill safety key size 2cmx3.5cm/0.79inchx1.38inch, and enough length string, which is universal for almost treadmills. Premium Material: The treadmill security lock is made of high quality ABS, with braided rope, solid and durable Clip Design: Strong clip that can easily clamp to any part of your clothing for holding, and you can forget about the key while you walk or run. Convenient Carrying: Lightweight treadmill safety key is easy to use and store. Specification: Material: ABS Color: Red Package Includes: 1Treadmill Safety Key Note: Please allow slightly errors due to manual measurement and different monitors.