"komobu" wrote in message
...

Also, please comment on grabit and other extracting
methods. What do
you think is the easiest way to remove a broken bolt?

Thanks for any advice
Pat

My favorite method is to center up an oversize hex nut (3/8
nut on a 1/4 bolt etc.) over
the broken remains, use a mig welder to weld the nut to the
broken stud/bolt.
Give it a shot of Kroil and unscrew. For small stuff drill
a hole in some sheet metal,
weld it to the screw, and weld a hex nut to the sheet metal.
Lots of Kroil, maybe run
it through a couple of heat/cool cycles, be patient. Works
90% + of the time.

Bill