Description: 【Part number】: Curt 28921 【Comprehensive Kit】: The Cordless Drill Adapter comes with two washers, bolt, and lock nuts, ensuring you have all the necessary components for installation 【Easy Installation】: Simply remove your existing manual crank handle and install the Cordless Drill Adapter to replace your trailer jack crank handle effortlessly 【Versatile Compatibility】: Featuring hex size of 3/4 inch, a shaft hole of 1/2 inch, and a through-hole of 1/4 inch, this adapter is suit for various setups 【Note】: For trailer jacks using metric fittings, you can either use previous fittings or slightly enlarge the through hole to 1/4 inch for compatibility with included components Specification: Material: Metal Size Chart: 1.9cm/0.75inch Package Includes: 1 Cordless Drill Adapter set Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!