I am using them to build a device for a cometition.They were perfect! Very powerful, and my classmates couldn't stop playing with them.Keep them away from children. TOO DANGEROUS to be a toy.Click Here to see more reviews about: Magcraft NSN0802 1/2-Inch by 1/8-Inch Rare Earth Disc Magnets, 14-Count
Product Description:
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 0.500 inch (12.7mm) diameter and 0.125 inch (3.2mm) thick. They are magnetized through the thickness. They are composed of grade 40 neodymium iron boron magnetic material and are plated in nickel-copper-nickel for a shiny corrosion resistant finish. Their individual pull force is approximately 5 lbs. Maximum working temperature is 176 F (80 C). Magnets may chip and crack if allowed to snap together.
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