Catching something very heavy!!!

Yesterday I went fishing the normal way with two of my friends. Our goal was to catch lots of fish, but after 2 - 3 hours with no luck, we decided to throw in the magnets and that was a very good idea. After two or three minutes, one of my friends said he had something very on the hook, as you can see in the picture below, there was a lot of tension in the rope.

We could lift the heavy thing a little, but when we reached a certain point the magnet couldn't lift it anymore.
But luckily we brought two of the large magnets so with some teamwork we got both magnets caught on the thing.

With a little effort and lots of times losing the object in the water we succeeded to get it to the surface.
IT WAS A BENCH :D