Don"t be fooled by their diminutive size. These neodymium cube mighties magnets are amazingly powerful. Neodymium magnets are a member of the Rare Earth magnet family and are the most powerful permanent magnets in the world. Each 3/16" chromed cube mighty is strong enough to hold 12 sheets of 8 1/2" x 11" paper! These innovative, functional and clever magnets incorporate performance with visual appeal. Like all other Three by Three Seattle products, the cube mighties are made with superior materials and are produced according to the highest standards of quality. Available in a convenient set of 6 magnets.