This product is a treadmill magnet safety key, made of ABS and magnet 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 one for you. Features -Color:Red-Material:ABS, magnet-Size:5.70X3.80X2.70cm/2.24X1.49X1.06in-Manufactured with high-grade ABS and magnet material, sturdy and practical for a long use. -More convenient, It can easily clamp to any part of your clothing, and it's also firm to hold. -This treadmill safety key is an important device that protects owners and user from injury by not allowing the treadmill to run without the key attached. -This safety key is suitable for most kinds of running machine on the market, and you can use it with confidence. -The treadmill safety key is an important device that protects the owner and user from injury by not allowing the treadmill to operate without a connected key. Packing list: 1 x Treadmill Key