by Shrub » 7 Jul 2006 17:30
We call them jig by the way over here and use them on fully bodies vehicles as well to straighten them out as you say after a accident,
A mate once had a chain snap on him on some farm machinary, it took a chunk out his face but luckily just threw him off his feet instead of him taking the full force,
I used to test wire ropes etc at my previous work plave and boy do they go with a bang lol (im talking up to 12" diameter ropes here by the way)