This is wheel brace (lug wrench to us yanks) that was supplied with all disc wheel MGA (not Twin Cam). On one end it has a 3/4-inch hex socket to fit the 7/16-inch fine thread lug nuts. On the other end it has a hook to assist in removing the hub cap. You can slip the small end of the largest tube socket (spark plug wrench) over the handle if you need more leverage.