Top Wind Trailer Jack Crank Handle with Cordless Drill Adapter Aluminum Lift Handle for Curt 28921 1/2 Inch Shaft 1Application: The top wind trailer jack crank handle is applicable for Curt 28921 1/2 Inch Shaft, for crank handles 28203 28200 28202 28250, please check before ordering. 2Innovative Design: The top wind trailer jack crank handle features cordless drill adapter made of high strength aluminum with a quick disconnect pin for enhanced trailer security. 3Safety Precautions: Before using, make sure to chock the trailer wheels and ensure the load on the trailer is secure. Do not remove the adapter while the jack foot is not firmly fixed on the ground. 4Powerful and Easy to Operate: Use a cordless drill with a 6 point 3/4in socket for low speed driving of the trailer jack after installation. If the drill battery fails, the original handle and quick release pin can be easily reinstalled. 5Effortless Installation: Swap your existing trailer jack handle with our quick release pin 'Crank Mate'. We advise removing any rust or burrs from the jack shaft before the installation for a smooth process.