BYKES Neodymium Super Strong Extremely Powerful Rare Earth Refrigerator Magnets 1/2" x 1/2" x 1/16" Square N42 - Set of 80 1/2"L x 1/2"W x 1/16" thick Square Magnets, magnetized through thickness, poles on the flat surfaces Super Strong Top Quality Neodymium (NDFeB) Rare Earth Magnets Approximate Pull Force: 3 lbs, Grade N42 Nickel-Copper-Nickel Triple Layer Coating for Maximum Durability and Protection against Corrosion WARNING: VERY STRONG MAGNETS. KEEP OUT OF REACH OF ALL CHILDREN. THIS IS NOT A TOY.