Features: Ensure workout safety with this universal treadmill safety key set, consist of durability ABS and magnets for reliability emergencies stops and power stability during intense running. Each light weight, crack resistant magnetic key fit most treadmills, features a bright red for quick visibility and long terms performances in fitness environment. Ideal for treadmill owners, gym enthusiasts, or family seeking to enhances equipment safety for users of various experience level, from casual joggers to dedicated athletes. Safeguards against sudden malfunctions during homes workouts or gym, ensuring instants treadmill shutdown if the user slip or loses balance middle exercise. The universal compatibility and bright color make these emergency stop magnets perfect for backups use or share with fellow fitness enthusiasts needing reliable treadmill safety accessories. Specifications: Outer diameter:3.2cm/1.25in Inner diameter:1.5cm/0.59in Component:plastic, magnet Package Includes: 1pc Universals Treadmill Magnet Security Key note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.