I use an old Lisle pickle fork on my cars to change the tie rod ends. No idea what size it is supposed to be, but the opening at the narrow end of the forks is 23mm and tapers down to 19mm towards the shaft. I can't imagine ever using anything smaller for any application.

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)