Internal yokes – there are two, at each stop of the PTO shaft – tractor and put into action. This is soldered to the driver’s stop. Cardan Joints – There are two, located on each stop of the PTO shaft. Outer Yokes – There are two, found on the two ends of the PTO shaft. It has a “Y” link to u and a feminine gap. Basic safety Chains – Chains are used to protected PTO shafts to tools and tractors. Safety Guards – These cones are found at each finishes.