Neodymium Disc Countersunk Hole Magnets, 1.26 inch x 0.2 inch Strong Permanent Rare Earth Magnets with Screws - Pack of 12: Amazon.com: Industrial & Scientific
Rare Earth Magnets 3 in x 1/2 in N42 Neodymium Disc - Applied Magnets - Magnet4less
Master Magnet 0.47 in. Neodymium Rare-Earth Magnet Discs (6 per Pack) 07046HD - The Home Depot
Large Rare Earth Magnets - Sold as a Pair | Jaycar Electronics