FEATURES: Neodymium (Nd) magnets are extremely powerful considering their small size. A multitude of benefits exist including home projects, crafts, aquariums, hanging accessories/picture frames, and fastening objects together. Nd magnets are brittle due to their composition, and susceptible to cracking or shattering if dropped on hard surfaces or collision occurs between magnets. In order to prevent oxidation and corrosion, Universal Magnetics disc magnets are coated with a layer of epoxy which does not affect magnetic energy or pull. Nd magnets are permanently magnetized and guaranteed to last forever when used as intended. SPECIFICATIONS: -