This Kit Features An Extra Thick Threaded Insert For AdjusTMent And Rebuilding. Uhmw-Pe Races For Superior Impact Resistance And Anti-Friction Properties With A Precision Machined End Right That Eliminates The Use Of The Snap-Ring And Washer Found In The Re3791 And Re3792 Super Flex Assemblies. Features 28 Degrees Of Mis-Alignment.