Zibuyu Treadmill Safety Key for Universal Use with Magnetic Round Lock | Compatible with Most BrandsZibuyu Treadmill Magnet Safety Key Universal is designed to ensure secure and reliable operation for most treadmills requiring a round magnetic safety key. Made from high quality ABS plastic with a strong braided rope, magnets, and springs, this key provides durability and stability during workouts. It is compatible with major brands such as NordicTrack, Proform, Weslo, Reebok, and Horizon, making it a versatile treadmill accessory. The safety key