CMS Magnetics® Grade N52 Super Strong Neodymium Magnet Ring OD1.26" x ID 1/2" x 3/8" - Rare Earth Magnet Ring for Classroom, Science Project and DIY Applications - One Pack: Amazon.com: Industrial
Wukong Fishing Magnet Double Sided Neodymium Magnet with Eyebolt, Combined 960 LBS Pulling Force Super Strong Magnet for Magnetic Fishing, Treasure Hunting Underwater - 2.95" Diameter: Amazon.com: Industrial & Scientific