The „DellenChecker“ is a very helpful tool to make dents and bumps easily and quickly visible, especially the easily overlooked hail damage on motor vehicles. This is made possible by the uniform stripes on the reflector disc. The reflector disc is held over the paint so the strips of the disc reflect. Smaller dents or bumps are shown by reflection breaks or kinks in the lines. These in turn can be easily photographed for documentation e.g. binding cost estimates, parking bumps or damage during the leasing return. The "DellenChecker" is ideally suited for mobile use, as it unfolds on its own, folds back within seconds and optimally stowed in the included carrying bag.