The ring nuts used on old Italian cars can be a pain to deal with without the right tools. In an earlier post we made a special ring nut tool to remove the rear stub axle nuts. In that instance space was tight so a specialized tool was needed. In many other instances there is lots of room to move and we came up with a simple tool that can be made from an old adjustable wrench. This was made up in less than 5 mins and we have so far used it to remove 3 different size ring nuts on the Dino with no damage of any kind to the nut.
The pictures should explain the whole procedure and this tool is adjustable for many sized ring nuts.