This is a new very high quality and correct pair of clutch pivot tube, Z-Bar, or clutch bell crank Pivot studs. These are the studs with the pivot ball on the end. One is mounted on the transfer case and the other is on the frame. These are almost always worn out. This is a way to take a lot of that excess play out of your clutch linkage. The rubber bushings keep the pivot tube tight on the studs. These were stock on the MB, GPW, CJ2A, CJ3A, M38, CJ3B, and M38A1.