This product is a treadmillmagnetsafety key,made ofABS and magnetmaterial, durable.It can effectivelyensure 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 ABSand 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 list1 x Treadmill Key