Features: Easily drive 5/8 inch & 3/4 inch rods into the ground with ground rod driver for hammer drill! Using a proprietary heat-treatments process and a unibodys designs, our bits offers exceptionally hardness to endure frequent use without easily breaking. This highly specialization tool is widely used in industrial settings for driving grounding rods, threaded steel. Great for tasks like installing fence poles, , parking bumper stakes, and electric fence posts. The poles driver simplifies this process of driving standard circuit ground poles into soft soil without the need for a large hammer or hydraulic hoses. Standard 10mm diameter shank. Should be used in hammer only mode. Specifications: Component:Chrome-Molybdenum Steel Type1: Size: Approx.14.5cm/5.7inch Outdoor Diameter:Approx.28.5mm/1.12inch Inner Diameter:Approx.16mm/0.62inch Type2: Size: Approx.14.5cm/5.7inch Outdoor Diameter:Approx.33mm/1.29inch Inner Diameter:Approx.20mm/0.78inch Package Includes: 1pcs Ground Rod Driver note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorings of the item. Thanks for your understandings.