Our mighty 4mm cubic rare earth magnets are incredibly useful, mesmerizing to fiddle with, and a steal for only 5 bucks for a tube of 20.
We had these custom manufactured to the highest magnetization the factory could concentrate into the small space.
Made from a neodymium (Nd) alloy, these magnets each have about a 4lb pull (direct metal-to-metal contact). They are nickel coated since the magnetic material is a highly compressed powder.
*NOT A TOY. NOT FOR YOUNG CHILDREN. DO NOT SWALLOW*