Automatic Protection: The safety lock is an automatic protection device for the treadmill. When the switch moves out of the treadmill's sensing area, the treadmill immediately stops and emits a beep to help prevent falls during exercise.Applications: This magnetic suction safety switch is designed for electric treadmills that use round magnetic switches.Easy to Use: Compact and simple to install. During use, place the safety key into the designated slot on the control panel and clip the other end onto your clothing for convenient operation.Durable Materials: Safety keys are essential for maintaining proper treadmill function. This round treadmill safety key is made from high-quality ABS plastic and magnets, enhancing both durability and safety.Lightweight and Portable: This emergency stop device is lightweight and easy to carry, making it convenient for use outside the home.Specification Item Type: Treadmill Safety Switch Material: ABS, Magnet Gross Weight: 31g / 1.1oz Product Size: Rope length: 92cm / 36.2in, Magnet shell diameter: 32mm / 1.3in, Height: 28mm / 1.1in, Magnet diameter: 9mm / 0.4in Diameter of single column: 2mm / 0.1in, Distance between two columns: 20mm / 0.8in (Note: The rope has slight elasticity. Manual measurement may result in small errors, which do not affect usage.)Package List 2 x Emergency Stop SwitchNote 1. Due to manual measurement, please allow 0–1cm size error. Confirm you are comfortable with this before purchasing. 2. Due to differences in monitor displays, the actual color of the item may vary slightly from the images shown.