@Howard not sure if you will but 11mm bolt handy?
instructables.com/id/How-to-remove-an-oversized-Allen-Boltanywhere/
instructables.com/id/How-to-remove-an-ovĀersized-Allen-Boltanywhere/
It's for removing a freehub, so it's probably best to get the exact fit - lots of torque needed.
@Clockwise started
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@Howard not sure if you will but 11mm bolt handy?
instructables.com/id/How-to-remove-an-oversized-Allen-Boltanywhere/