Them sockets are utter shite and a waste of money !!

The only thing that works it to use a multi spline socket and hammer it over the locking nut, needs to be a right tight fit in order for it to grip though.

Hammer the socket on then use a long power bar to give you plenty purchase on it, use a hammer to shock it whilst trying to loosen the nuts and will work every time... never been stuck with one yet and get called out to breakdowns all the time where someone has a puncture and they cant find the locking wheel nut key !