Fangrui Product Details Characteristic: The Grounding Rod Screwdriver Is Made Of Steel, Which Is , High In Hardness, High In Strength, Wear- And Impact-, Provides Good Rust Protection And Can Be Used For A Long Time. There Are Two Different Types Of Drills, Including A 21 Mm Drill Driver And A 19 Mm Round Shank Drill Screwdriver. Our Grounding Rod Driver Is Compatible With Almost All Of Sds Plus Rotary Hammers And Hammer Drills. Please Make Sure It Fits Your Tool Before Buying. The Drill Screwdriver Is Easy To Install And Disassemble Without The Help Of Other Tools, Saving Your Time And Improving Work Efficiency. The Drill Bit With Metal Wall Can Bear Greater Impact Without Damage. With This Grounding Rod Driver, You Dont Need To Use Sledgehammers And Wooden Boards To Install Grounding Rods, Small Fence Posts And Small Electric Fence Posts. It Can Time And Provide You With Higher Security. Describe Name: Round Shank Drill Driver Specification: 19mm,21mm Quantity: 2pcs Material: Steel Colour: Silver Package Contents: 1 X 19mm