By purchasing a fixed roof rack or ski rack (to be mounted on the rails) we verify that they are suitable for the type of car and of good quality.
In the case of the magnetic ski carrier, check that the roof surface is smooth without grooves to ensure a good grip.
Before mounting it, remember to perfectly clean the surface to avoid slipping and chipping.
Check every two or three days that the screws on the luggage rack are tight.
Remember not to overload the roof, never load more than 50-70 kg.
If you use the roof rack often, consider using a lockable roof rack, it is more aerodynamic.