• Material: Sintered neodymium magnets, grade N52 NdFeB • Remanence: 14,400 Gauss or 1.44 Tesla ( Residual Magnetic Flux Density ) • Pulling Force: 5.9 lbs • Pole Orientation: Through the thickness, the poles are on the 3/8" x 3/16" surfaces. • Coating: Ni+Cu+Ni 3 layer coating, the best available. • Tolerance: The tolerances of all the dimensions are +/-0.002 in with coating. • Made of a grade N52 neodymium, iron, and boron magnetic alloy blend. This magnetic blend is patent licensed and made under the ISO 9001 quality control systems and are plated in a nickel-copper-nickel triple layer coating for a shiny corrosion resistant finish. This magnet is great for holding purposes such as holding objects to magnetic surfaces. Moreover, this magnet is versatile and robust; applications range from industrial use to personal projects.