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 design, simple to install and operate. The safety lock attaches to the panel groove, with the other end clipped to 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 emergency stop device is lightweight and easy to carry, ideal for use at home or while traveling. 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 a single column: 2mm / 0.1in, Distance between two columns: 20mm / 0.8in (Note: Rope has slight elasticity. Manual measurement may result in a 0–1cm error, which does not affect functionality.) Package List 2 x Emergency Stop Switch Note 1. Due to manual measurement, please allow 0–1cm error. 2. Due to differences in monitor displays, the actual color of the item may vary slightly from the images.