Hey, if your treadmill's safety key is lost or broken, this 2-pack of universal magnetic safety keys is exactly what you need to get back to your workouts safely. These red plastic keys with built-in magnets are designed to work with most treadmill models, so chances are high they'll be compatible with your machine. Each key has a total length of about 105cm (41.3 inches), with a 2.7cm magnetic clasp and a 5.7cm clip - plenty of length to reach comfortably while you're exercising. The magnetic connection is what makes these work - when you pull the key out (like if you trip or fall), the treadmill automatically stops, which is that crucial safety feature we all need. Having two in the pack is super convenient because you can keep a spare handy just in case, or maybe even use one for a different treadmill if you have access to multiple machines. Installation is straightforward - just clip one end to your clothing and insert the magnetic end into the treadmill's slot. It's important to note that these aren't toys though - the product specifically mentions it's not suitable for children aged 13 and under. The materials feel durable, and the bright red color makes them easy to spot if they happen to fall on the floor. Honestly, it's one of those small accessories that you don't think about until you need it, but having a working safety key is essential for safe treadmill use. Whether you're replacing a lost key or just want a backup, this 2-pack gives you peace of mind for your home workouts!