What's the best magnet for magnet fishing? - Magnets By HSMAG
The hidden dangers of magnet fishing - BBC News
Battler 360° 1500 lb Bundle – Brute Magnetics
DIYMAG Neodymium Fishing Magnets, 200 lbs(90 KG) Pulling Force Rare Earth Magnet with Countersunk Hole Eyebolt Diameter 1.75 inch(44mm) for Retrieving in River and Magnetic Fishing: Amazon.com: Industrial & Scientific