Features: new and high quality The ground rod driver is made of chromes vanadium steel with a heat treatments process that provides excellent durability. Ground rod driver for driving ground rods or bars without a large hammers, suitable for 5/8" and 3/4" ground rods. Durable design saves a lot of impact with a hand hammers and ensures easy installation of the ground rod. Suitable for commercial and industrial use. Standard SDS Plus shank works with all SDS size impact hammers and hammers drills. Specifications: Material:Chromium Steel Size:M8/M10/M12/M16/M20 Type:Square Shank/Round Shank Square Shank M8: Inner Diameter: 8mm Total Length: 141mm Sleeve Depth: 62mm Square Shank M10: Inner Diameter: 10mm Total Length: 135mm Sleeve Depth: 62mm Square Shank M12: Inner Diameter: 12mm Total Length: 144mm Sleeve Depth: 59mm Square Shank M16: Inner Diameter: 16mm Total Length: 165mm Sleeve Depth: 80mm Square Shank M20: Inner Diameter: 20mm Total Length: 180mm Sleeve Depth: 85mm Round Shank M8: Inner Diameter: 8mm Total Length: 143mm Sleeve Depth: 61mm Round Shank M10: Inner Diameter: 10mm Total Length: 137mm Sleeve Depth: 62mm Round Shank M12: Inner Diameter: 12mm Total Length: 145mm Sleeve Depth: 72mm Round Shank M16: Inner Diameter: 16mm Total Length: 165mm Sleeve Depth: 83mm Round Shank M20: Inner Diameter: 20mm Total Length: 165mm Sleeve Depth: 85mm Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x SDS Plus Ground Rod Driver Bit