Maynard G. Krebbs writes:

On Mon, 17 Nov 2003 21:42:48 -0500, "B" wrote:

at my local ace hardware I found "easy outs" with a built in left hand drill
bit on the tip, often just the drilling process into the shank of the broken
screw is enough to get it backed out enough to grab on with pliers. I've
heard of sets of left hand drill bits being available but never been
desperate enough to try and find them

Eastwood has left-handed drill bits for removing bolts and screws.
http://www.eastwoodco.com/

Arizona Tools has collected a dozen different tool kits for screw
extraction at http://www.arizonatools.com/catalog/...417-3012-3009/

Pekka
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