Round Powerful Magnet Dia 2mm-9mm Rare Earth Neodymium Iron Boron Small Magnet | eBay
DIYMAG Strong Neodymium Fishing Magnets, 700 lbs(318 KG) Pulling Force Rare Earth Magnet with Countersunk Hole Eyebolt Diameter 2.95 inch(75 mm) for Retrieving in River and Magnetic Fishing: Amazon.com: Industrial & Scientific