Dental Automatic Teeth Crown Remover Adjustable 4 Shifts Stainless Steel. Metal crowns, porcelain crowns, cast crowns, resin crowns, as long as the doctor push the button, it will automatically dislocate, made the patient without any pain. The product with small and exquisite appearance, compact internal structure and reasonable security, which is a good helper of a dentist. Highly polished finish for aesthetic and corrosion resistance.