Abstract: A paving system comprising a support frame, porous material above the support frame and pavers above the porous material, suitable in certain configurations to have mirror image support frames suspendable at their inner points from the outer periphery, and fitting about a tree or other object.

Abstract: An improved peening tool comprising a cylindrical body having a plurality of holes each adapted to receive a spherically shaped ball bearing. A sleeve member having a plurality of holes is located over the cylindrical body so that each hole in said sleeve is aligned with the hole in said cylindrical body. The diameter of the hole in the sleeve is less than the diameter of the spherically shaped ball. A rotatable driver body is located within said cylindrical body and contains an even number of individual rotatable hammers adapted to sequentially contact said spherical balls. During operation each hammer is free to rotate about its own axis thereby presenting a new contacting point for moving the spherical balls.