Power your agricultural machinery with confidence using this heavy-duty Series 4 tractor PTO drive shaft. Expertly crafted from premium 20CrMnTi carburized steel and high-strength Q345 tubing, this shaft is built to deliver exceptional impact strength and wear resistance for years of reliable farm work. Designed for universal compatibility, it features 1-3/8" 6-keyway splines on both ends, ensuring a secure and tight fit for a wide range of PTO-driven equipment, including bush hogs, rotary tillers, and finish mowers.