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. Place the safety key into the panel groove and clip the other end onto clothing for convenient use. Durable Materials: Safety keys are essential for maintaining proper treadmill function. This round 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 travel or outdoor workouts. 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: Rope has slight elasticity. Manual measurement may result in a 01cm variation, which does not affect performance.) Package List 2 x Emergency Stop Switch Note 1. Due to manual measurement, please allow 01cm 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 image. Thank you for understanding.