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Casting metal screw extraction technique.
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Previously:
Perfect screw extraction - GIF
Screw extraction pliers - GIF
Stripped screw head extraction trick - GIF
Come on get real. If the screw was tight the method shown would just unscrew like a nut, if the screw was loose then a pair of pliers would unscrew it easily. A ground/filed/sawed flat on the screw would be in with a chance that a moderately tight screw could be undone by this method.
Looks (0:01) like there is a flat on the screw, but not deep enough?
Also, this method would probably discolor the wood or at least the steam created from the heat would damage the wood.
I have used vise grips on this kind of situation many a time with great success...
I drop a washer over the screw, then clamp on the vise grips, washer prevents the vise grips from marring the wood. Looks like he used Cerro Safe® or "WoodsMetal"® low melting points, Cerro Safe melts at 158 degrees, but still would probably discolor the wood even when quickly cooled.
I use it in the gun shop to remove really stuck cases from rifle chambers that the head of the case has ripped off, really handy for that.
...comment deleted.