Abstract: An impact device having a housing with hollow cylindrical aperture therein. The cylindrical aperture has a rotatable member within. The rotatable member has axial multiple rods thereon. On each rod of the rotatable member there are captive annular masses with a central aperture larger than the diameter of the rod to permit radial movement of the masses with respect to the rod. The rotatable member is driven by a motor and in turn rotates the annular masses which strike impact tools also supported within the housing. The kinetic energy of the annular masses is thereby transmitted via the impact tools to the outside of the impact device.