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 install and operate. The safety key is placed in the designated slot on the control panel, and the other end is clipped to the user's clothing for convenient and secure operation. Durable Materials: Treadmill safety keys are essential for maintaining proper treadmill function. This round safety key is made of high-quality ABS plastic and strong magnets, designed to enhance durability and safety. Lightweight and Portable: This treadmill emergency stop device is lightweight and easy to carry, making it convenient for use at home or while traveling. 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: The rope has slight elasticity. Manual measurement may result in a 0–1 cm variation, which does not affect functionality.) Package List: 2 x Emergency Safety Switches Note: 1. Due to manual measurement, please allow 0–1 cm size error. Confirm you are comfortable with this before ordering. 2. Due to differences in monitor displays, the actual color of the item may vary slightly from the images shown.