Irwin 394002 Bolt Grip Nut Remover Expansion Set, 5/16" (8mm), 10mm, 13mm, 11/16", 3/4" (19mm) https://amzn.eu/d/3jtLwNP
I have a set of these for just such occasions. Only needed to use them a couple of times in the last 15 years, but they have got me out of a sticky situation.