A unitary tool that combines a ground rod to a self-hammering mechanism in a trapped configuration. The ground rod has a length ranging between forty-two and fifty-two inches for facilitating the self-hammering functionality. The ground rod is made from copper-bonded steel for more effectively grounding an electrical connection than the prior art.

A unitary tool that combines a ground rod to a self-hammering mechanism in a trapped configuration. The ground rod has a length ranging between forty-two and fifty-two inches for facilitating the self-hammering functionality. The ground rod is made from copper-bonded steel for more effectively grounding an electrical connection than the prior art.

A piston for a hydraulic hammer assembly is provided. The piston may include an elongate member extending from a distal end to a proximal end and having a first outer diameter, a flange disposed on the elongate member and having a second outer diameter greater than the first outer diameter, and a non-ferrous shoe radially disposed on the flange.

A hand-held power tool has a tool socket 2 to hold a tool on a working axis 11. A pneumatic striking mechanism 6 has an exciter piston 13 that is forced to move periodically along the working axis 11 by a motor 5 and it also has a striker 14 that is coupled to the exciter piston 13 via a pneumatic chamber 18. The exciter piston 13 has a cylindrical main body 21 made of a polymer. One or more rings 24 containing copper surround the main body 21. The rings 24 protrude from the main body 21 in the radial direction.