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: Magnetic suction safety switch for electric treadmills, compatible with electric treadmills that use round magnetic switches. Easy to Use: Compact, simple to operate, and easy to install. The safety lock attaches to the panel groove and clips onto clothing for convenient use. Durable Materials: Safety keys are essential for maintaining proper treadmill operation. This round treadmill safety key is made of high-quality ABS plastic and magnets, enhancing durability and safety. Lightweight and Portable: This treadmill emergency stop device is lightweight and portable, allowing you to carry it easily when traveling or exercising away from home. 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 a single column: 2mm / 0.1in, distance between two columns: 20mm / 0.8in (The rope has slight elasticity; manual measurement may result in a 0–1cm error, which does not affect functionality.) Package List: 2 x Emergency Safety Switches Note: 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 image may not reflect the actual color of the product.