This product is a treadmill safety key, made of reliable material, durable. It can effectively ensure the safety of treadmill users. Convenient and easy to use and store. Suitable for home and gym use. Choose . Features -Color:Red -Material:Plastic,alloy,rope -Size(clip):6.00X3.20X3.00cm/2.36X1.26X1.18in -Size(rectangle):4.60X2.80X2.40cm/1.81X1.10X0.94in -Using reliable material and good craftsmanship, strong and durable for long-serving life. -This safety key is compact size and lightweight, which is very easy for you to install and carry out. -Magnetic safety for electric treadmills with rectangle magnetic . -When the is out of the treadmill sensing area, the treadmill immediately stops working and emits a sound to protect the user from falling during the exercise. -This stop key can effectively control the safe emergency stop of the treadmill in a short time. Package list: 1 x Treadmill Lock