1Automatic Protection Device: When the safety switch is separated from the sensing area of the treadmill, the treadmill will stop working immediately and emit a prompt sound, which plays a protective role to prevent the user from falling and being injured during exercise. 2Easy to Use and Install: This treadmill safety lock replacement is compact, lightweight, which is also easy to use and easy to install. 3Use: When it is in use, the safety lock is placed in the panel groove, strong clip can be easily clipped on clothes, easy to operate and durable. 4Practical: The treadmill safety switch is extremely important to maintain the efficient operation of any treadmill exercise, and are commonly used for Yijian AD treadmills. 5Premium ABS and Brass: Our treadmill safety accessories lock is made of premium ABS and brass which is strong and not easy to be broken.