This item was pre-installed as picture.
It is consisted the follwoing parts. Metal trunnins; 5mm strut wires; side pin; and collars
This metal trunnion not only able use for 90 rotate retract, as well as use as normal trunnion of convensional retract, as long as you use a set screw fix the strut wire to lock it not be moving.
It also able use for steerable retract trunnion as long as use a steering arm with e-clip fixing the strut wire (not included)
The side pin come with this upgrade kit is use screw thread fixing to the strut wire, it is more easy for install to the strut wire.
If you use it for the regular size 90 rotate retract. It is very easy to replace the original plastic trunnion. Open the housing, take away the plastic trunnion with the original strut wire, place it to the retract then reassemble it.