if you could make your own handle, you could drill your hole first, then it wouldn't matter if you went off with the hole if you start off with a square blank of wood, then put on the lathe, or finish by hand. just my thought on it.
they look like plugging chisels to me, some look like they're modified a bit though. plugging chisels are used for cleaning out the mortar from between brick joints.
thanks to brian and everyone who contributed to this post, have been trying to get collers and scrolls right for a while, this info is a great help! thanks again merry christmas and have a peaceful and happy new year.