Hammer the suitable sized (can’t recall ) socket on it. Or if you have socket mounted torx, hammer one in.

Alistair 

> On Dec 31, 2023, at 5:12 PM, Rick Cooper <rick@webleaf.ca> wrote:
> 
> Hi all,
> 
> I've got a noisy CV joint and thought I would remove and repair it today.  But I managed to round off one of the twelve 6mm Allen socket-head bolts so that I cannot break the last bolt free.  Unfortunately it is on the outside CV joint so it inaccessible by most tools.
> 
> Has anyone had this experience and can offer any advice?  Am I stuck drilling out/off the head of the bolt?  And then how do I remove the shaft from the wheel assembly since it will be challenging, even with joint out of the way, to get a good hold on it with vice-grips?
> 
> Thanks for any help.
> 
> Rc