The Series 4 PTO Shaft is compatible with gearboxes featuring a 1-3/8" Z6 input shaft. It is equipped with a shear pin that protects the drive shaft from damage when subjected to excessive load. The PTO Shaft includes a quick-release splined yoke on the tractor side and comes with safety shields and chains. It measures 31-1/8" (790 mm) when compressed and can extend up to 39-9/16" (1005 mm).