What is some of the worst stuff you have found on lawns? I have found everything from electric fence standards (high tensile steel), dog chains, fencing wire, rope, garden tools, spanners, hammers, axes, sledge hammers, steel reinforcing steel, car tow balls, the list goes on. Four broken decks and numerous blades later........... But the worst thing I found was a live 12g shot gun cartridge that gave me the creeps, luckily I saw it before I hit it heaven knows what would have happened if I did hit it. I freaked me out! The owner got a good rev up.