Perhaps you could describe the problem a little bit. There are
easy outs and other methods of working on stuck bolts. There are
even acids that might lend themselves.

If you break off a cobalt bit in your stuck bolt, things could be
much worse.

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______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)




"Tony Hwang" wrote in message
news:JU60j.8639$fD.1416@pd7urf3no...
Hi,
What is toughest drill bit for drilling many, many holes
thru a bolt stuck in a confined space. I am trying to drill
it into bits to break it off. There is no other means to get rid
of it.
Cobalt bit or any other better one?
TIA,