1Treadmill Safety Switch: The safety switch, also known as the safety lock, is an automatic protection device for a treadmill. When the safety switch disengages from the treadmill's sensing area, the treadmill immediately stops working and emits a warning sound, providing a protective effect to prevent users from falling and getting injured during exercise. 2Magnetic Work: The treadmill safety key can work easily and quickly on most treadmills that require a circular treadmill safety key, which is extremely important to maintain efficient operation of any treadmill movement. 3Safety Lock and Strong Clip: When in use, the safety lock is placed in the panel groove, and the strong clip can easily clamp to any part of your clothing and it's strong to hold. 4ABS And Magnet Material: Treadmill safety key is made of ABS and magnet material, fine workmanship makes the product durable, not easy to damage, and greatly extend the service life. 5Small and Lightweight: Treadmill safety lock has a compact structure, and is light weight, easy to use, and easy to install. Item Type:Treadmill Safety Key Material: ABS, Magnet 2 x Treadmill Safety Key