Introducing Checklink, the world's first biodegradable wheel nut indicators that serve a dual purpose. These indicators visually show any movement in wheel nuts and help prevent their loosening, ensuring fleet safety. Checklink also helps indicate faults with brakes or bearings through melting at a specific temperature of 125ºC/257ºF. Its innovative 'S' shape design provides a retaining function, causing resistance to wheel nuts loosening. Checklink is the perfect solution for commercial vehicles and road transportation associations looking to ensure roadworthiness and safety.