DIYMAG Super Strong Neodymium Fishing Magnets, 1100 lbs(500 KG) Pulling Force Rare Earth Magnet with Countersunk Hole Eyebolt Diameter 3.94 inch(100mm) for Retrieving in River and Magnetic Fishing: Amazon.com: Industrial & Scientific
Doppelseitiger Magnet 500 kg zum Magnetfischen - BRAVIOR
Double Side Magnet Fishing Kit 75mm 500kg Magnet Fishing with Eyebolt Strong Powerful Neodymium Fishing Magnet with 10m Rope for Magnet Fishing and Salvage in River (500KG) - Walmart.com