Electromagnets use an electric current to create a magnetic field which attracts and pulls the metal of the car dent, ultimately removing it.
Electromagnets are most effective at removing shallow dents that are made of ferromagnetic metals, such as iron, nickel, or cobalt. They may not be as effective on deep dents or those made of non-ferromagnetic metals like aluminum or plastic.
As long as the electromagnet is used properly and is not too strong, it is safe to use on a car's body. However, it is important to take precautions and avoid using it near sensitive electronic components or on painted surfaces to prevent damage.
In most cases, electromagnets will not cause any structural damage to a car. However, if too much force is applied or the magnet is used on a weakened area, it is possible for the metal to bend or deform.
While using an electromagnet may seem simple, it is important to have some knowledge and training on how to use it properly. This will ensure the safety of both the user and the car, as well as increase the chances of successful dent removal.