BYKES Neodymium Super Strong Extremely Powerful Rare Earth Refrigerator Magnets 1/2" X 1/16" N42 - Set of 80 1/2" diameter x 1/16" thick, 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.