Agree, it is very unpleasant to drop nuts and bolts during the repair of the car, and then try to find the loss. It is especially inconvenient to retrieve the elements if they have fallen in the under-hood space. To prevent this from happening, use a special magnetic mat. It can be conveniently attached to any metal surface, such as the car body, without fear of leaving scratches. The magnet is strong enough for heavy keys and tools.