Check the listing for details. Universal Magnet Treadmill Safety Key Running Machine Security Round Switch Lock. Condition: New. Listed at 5.51 USD. Universal Magnet Treadmill Safety Key Running Machine Security Round Switch Lock Package include Safety key x1 Product description 100% brand new and high quality Material: ABS, Magnet Applications: for electric treadmills Features: Treadmill safety lock, automatic protection, magnetic suction, safe, compact, easy to use, easy to install, easy to operate, sports equipment Dimension: A: 3cm B: 1.8cm C: 1.9cm Feature The safety lock is an automatic protection device for the treadmill. When the switch is out of the treadmill sensing area, the running opportunity immediately stops working and emits a beep to protect the user from falling during the exercise. Magnetic suction safety switch for electric treadmills with rounded magnetic switches. It is compact, easy to use, and easy to install. When used, the safety lock is placed in the groove of the panel and the other end is attached to the clothing, which is easy to operate. Fashion design,100% Brand New,high quality!