Any iron junk (especially nails) will jump onto the powerful magnet saving a lot of time and hassle!
This has been a wonderful addition to my digger. http://www.amazon.com/Magnetics%C2%AE-Grade-Neodymium-Magnets-4-Counts/dp/B000UUDGV0?tag=treasurenet01-20 :icon_thumleft: