IRWIN Tools 332019 Ground Rod Driver, SDS Max Shank, 7/8" - 1.35" x 10-1/4", is constructed for driving in ground rods, popular in telecommunication applications. This ground rod driver is heat-treated for strength and extended tool life. The bit is also forged from superior-grade steel, and the working point may be re-sharpened for longevity. The IRWIN Tools ground rod driver spline type is SDS-max.