Two unique makita features contribute to the super safe low vibration benefits of this advanced machine the patented makita avt anti vibration technology system uses the pneumatic pressure generated in the hammer piston chamber to move a counter balance in the opposite direction to dampen out the impact vibrations at the steel point this dramatically reduces machine produced vibrations and in addition to the advanced avt system this new makita 5kg hammer features the 2 mass fulcrum hinged r