Rare Earth Magnets 1/2 in x 1/2 in X 1/4 in Neodymium Block N42 - Applied Magnets - Magnet4less
DIYMAG Strong Permanent Rare Earth Magnets,Powerful Neodymium Square Magnets for Fridge, DIY, Building, Science, Craft, and Office, 1.26 inch x 1.26 inch x 0.08 inch, Pack of 6 - Walmart.com
Super-strong neodymium magnets crushing a man's hand - YouTube