I would put the ferrule on the handle, if the handle has a piece coming down to the shaft of the cane, as drawn. But in general, I don’t have that weak bit in the handle, so I can attach a decorative bit to the end of the shaft. This is an apple and oak cane I made most recently, with a granadillo decorative bit on the end of the shaft. This was for a woman who’s about 5’ tall, so a ⅞ inch white oak shaft was plenty of strength, and I turned a ½ inch round tenon on the shaft, put on the granadillo cross-grain to avoid any possible splitting when I wedged the shaft into the handle. I even forgot to glue the wedge, but it had enough friction that it’s stayed put for a couple months of use with no movement.
