Features: The ground rod driver is steel, with high hardness and strength, wear resistant and offer great protection against rust, and can be used for a long time. Our ground rod driver is suitable for rotary hammers and hammer drills. Please make sure it fits your tool before purchasing. The drill bit driver is easy to install and disassemble without the assistance of other tools, saving your time and improving working efficiency. The bit driver with a metal wall can withstand greater without damage. With this grounding rod driver, you do not need to use sledgehammers and wood boards to install grounding rods, small fence posts, and small electric fence posts. It can save your time and give you more safety. Specifications: Component:Steel Diameter:19mm/21mm/30mm/45mm/65mm Package Includes: 1Pc Ground Rod Driver note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.