Pivot, Pin & Screw; Alloy CV D/Shaft - If the grub screw should come loose in your Alloy CV Driveshaft you may lose the pin. So this pack includes the threaded Pivot, 2 flatted pins and one grubscrew as they are easily lost in the carpet. When re-assembling make sure the grub screw can go tight against the pin. If the threads are not full depth the screw can feel tight but may not be holding the pin. Use threadlock but very carefully!!