When undoing tight nuts and bolts there is often a chance that someone will use two spanners, this is called the two spanner trick, two wrench trick, doubling up spanners or doubling up wrenches. A much better idea is to use a dedicated wrench extender as seen here- https://www.ultimatehandyman.co.uk/forum1/wrench-extender-t73939.html
Post time: Jul-06-2017