Neodymium Disc Countersunk hole Magnet,JUNAN 10Pack 20mmx3mm 5 mm Strong Permanent Rare Earth Magnets with 10 Screws

MAGNET WITH HOLE- 20 mm diameter x 3 mm thick with a 5 mm diameter countersunk hole for fixing ,-0.3mm tolerance，Supplied with 10 positioning screws. RARE EARTH MAGNETS- The Rare Earth Magnets is one of the most powerful, relative to its size, you can get stronger adhesion than other magnets. Nickel-plated NEODYMIUN MAGNETS- Coated with three layers of nickel, copper and nickel to reduce corrosion and provide a smooth finish which greatly increase the longevity of the Magnets. DIY DISC COUNTERSUNK MAGNETS- Use your rare earth magnet for just about anything, including finding studs in your wall, re-magnetizing old magnets, Permanent Magnets, Strong Round Magnets for used as refrigerator-magnets, arts and crafts, hobbies, office organization, hanging spice jars, papers, sign, note or picture holder, hardware tools hanger, artwork, handcraft DIY material, pictures and whiteboards on the fridge, tools in the garage, or the science classroom at school. NOTES-If you want to separate this Round Pot Magnets，Slide a magnet from the top of the stack.Once you have turned off the stack, gently lift the magnet.Lift the magnet to free it from the stack.avoid mutual collisions and external impacts that cause magnets to break!