Neodymium Disc Magnet 4 x 4 mm N35EH
 
Neodymium (NdFeB) is among the strongest magnetic materials, even in small sizes, and its stability makes it useful for many practical applications. Neodymium is much stronger than ferrite, and its protective coating helps prevent corrosion. The N35EH magnet belongs to the NdFeB family, commonly ranging from N35 to N52; a higher number generally means greater magnetic attraction.
 
The Ø4 × 4 mm size is suitable for DIY projects, small holders, catches and temporary attachments to steel. The metal material and thickness strongly affect performance. A thicker, flatter surface gives a better hold.
 
Warning: keep out of reach of children. Magnets can snap together suddenly, pinch skin and chip or break on impact. Handle them carefully when bringing them together or separating them. Keep them away from sensitive electronics, cards and medical devices.