Features: Get the power and versatility of a slide hammer without marring the finish by welding or drilling body panels. Pneumatic control creates a super-strong vacuum, making it easy to pull most dents out of panels. Instantly removes most dents from small auto or light truck without damaging paint Requires air compressor - no drilling, welding or sanding required ( compressor, hoses are not included) 4-3/4" rubber cup for dents .