When you tried to get a screw out of the angle iron, and it came off (catastrophe), or was impossible to get out because someone before slipped so you have to drill the head off to get the fitting off. Then comes the next step, remove the rest of the screw from the wood. This drill goes around the screw so you can loosen it, and gets a hole that is about 8mm.
Our wooden dowels fit nicely into the holes again, then it's just a matter of continuing to work as if nothing has happened.
