PTO shafts vary in measurement and you will want to uncover a matching coupling to drag. Attaching the tool to the tractor must be effortless. If you have to carry the system off the floor to connect to the driveshaft, or if the driveshaft is also long, forcing the link could damage each. If you have an current PTO shaft handy, it is simple to verify your size. Shut it and measure from PTO yoke to yoke.