This is a treadmill safety key designed to stop your treadmill in a short time, and it is made of sturdy material, sturdy and practical for a use. And it is equipped with a magnet design, which is easy for you to install it, and you can have safe fitness with this safety key. Features -Color:Red -Material:ABS, Magnet -Size: 4.70X2.00X2.00cm/1.85X0.79X0.79in -Manufactured with 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. Package list: 1 x Treadmill Key