Baumr-AG JackHammer Demolition 3.5HP Petrol Jack Hammer Concrete Rock DrillThe Baumr AG petrol powered jackhammer is a full commercial grade unit, which ultilises the highest spec motor and mechanical components, combined with a high tensile reduction gear set. This is one of the few jackhammers you are likely to find with these specs. The benefit of such a combination is a greater impact transfer with minimal loss through motor and gear cluster a truly fantastic machine! Huge torque from the perfectly matched 49. 3cc power