The reflector indicator aims for more safety in traffic, specifically for the traffic in the blind spot area of buses and trucks.
The reflector is part of the cover which also functions as a wheel nut loosening indicator.
Retro-reflection material is used on the the top of the cap to reflect the light towards other road users.
When the steering axle wheels of the vehicle start to turn, the light from the cover reflects, allowing other road users to act quickly.
Available in nut sizes: 32mm and 33mm