"Wild_Bill" wrote in message
...
The bolt extractor sockets work fairly well for hex-shaped fasteners. The
sockets need a little room (laterally) to bite into the fastener for a
good grip.
They proved to be very useful for removing rusted brake line nuts after
cutting the lines away from the line nuts.

The most important aspect of the sockets is likely to be the quality of
the steel that they're made with.
It's probably likely that some users pound the sockets onto the fastener
with a hammer, and use them with impact wrenches.

Another rusted fastener method is heating the fastener, and applying
candle wax. Since paraffin is a product that's commonly found in many
lubricants, the paraffin is beneficial when it reaches the threads.

I believe someone here once recommended beeswax as having a higher melting
point.