Features 1、Durable Construction: This treadmill universal safety key is made of ABS plastic, high strength and not easy to damage, and is suitable for long term use by runners. 2、Strong Clip: Treadmill key can be easily clipped to any part of the clothes, and it is very firm. It can be easily clipped to almost all types of clothes. Simple and convenient to use. 3、Compact and Convenient: Treadmill universal safety key has compact size, easy to carry, suitable for gym, home, etc., safe and easy to use, can be an essential sports equipment. 4、Protective Function: This treadmill security lock is an automatic protection device for the treadmill. When the safety switch exceeds the sensing area of the treadmill, the running machine immediately stops working and emits a prompt tone to protect the user from falling and injuring during exercise. 5、Easy to Install: The treadmill safety switch lock can run perfectly on most treadmills, small, lightweight and easy to install, don't need too much tools or complicated steps. Item Type: Treadmill Safety Key Material: ABS, Magnet Package List 4 x Treadmill Safety Key