Pack of 4 N52 Strong Neodymium Disc Magnets with Double-Sided Adhesive Powerful Permanent Rare Earth Magnets Fridge DIY Building Scientific Craft Office Magnets 1.26" D x 1-12"H

Rare earth magnets are the strongest type of permanent magnet currently made. They are amazingly powerful for their size and have innumerable uses. These disc magnets are 1.26 inches (32mm) in diameter and 0.08 inches (2mm) thick. They are magnetized through the thickness. They are composed of neodymium iron boron magnetic material and are plated in nickel-copper-nickel for a shiny corrosion-resistant finish. The maximum working temperature is 176 F (80 C). These 32mm diameter Neodymium disc magnets produce an astonishing pull of 20lb and every magnet has a triple coating of nickel, copper, and nickel again to prevent corrosion. Holding Force detection method: We use the automatic machinery at a pull-off speed of 80mm/min to test products by attracting on a 10mm thick steel plate