Lock nuts

[playwme]

Or even better if you have a Torx (star) socket large enough.

Thats a good trick that one. I had one that was ultra tight and all mangled around the outside. Ended up drilling a hole in the centre and hammering in a big torx socket and then managed to crack it with a long breaker bar.

[wbute]

I am pretty sure I have some torx sockets. Thanks for ideas!