Description:Part number: Curt 28921Comprehensive Kit: The Cordless Drill Adapter comes with two washers, bolt, and lock nuts, ensuring you have all the necessary components for installationEasy Installation: Simply remove your existing manual crank handle and install the Cordless Drill Adapter to replace your trailer jack crank handle effortlesslyVersatile 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 setupsNote: 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 componentsSpecification:Material: MetalSize Chart:1.9cm/0.75inchPackage Includes:1 Cordless Drill Adapter setNote: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!