Instructions for installing a cotter pin through the castle nut on a propeller shaft.
https://enjoythedrive.com/ Ratcheting Die Nut and Tap Wrench: Mini-vice adaptor from 1/4″to 3/4″ capacity. Cuts/renews threads in restricted areas. Reversible ratcheting action. Adaptor bushing included allows to use both hex and 12-sided dies. Vice adapts to all kinds of screwdriver bits.