Nd, NIB or NdFeB magnets are very strong and are nickel plated for corrosion resistance for use in science, education, industry and magic. NdFeB's and are magnetized through their thickness and are very strong, so start small. Keep away from small children. If 2 are placed close enough, they will snap together so quickly they could break a finger bone or cause a serious blood blister.
Larger disks are strong enough to attract each other through an adult's hand.
Detect the metallic pieces embedded in genuine US paper currency. Hold one under a glass flask and it will keep a stirring magnet in place while you pour out the liquid. All Rights Reserved .