• Strength & Durability: ring circular magnets have high resistance to demagnetization, corrosion & oxidation. Our round hole ceramic magnets owns strongest magnetism to satisfy your various needs and applications. The power exists forever under 200°Temperature. • Easy to Diy : Craft magnets for discretionary design. Donut flat ceramic magnets sticks tightly on any metal surfaces like refrigerator, dish washer, white board, stationary,etc. • Widely Used: People widely use Our Disk Hole Magnets as Kitchen magnets, Office magnets, Science magnets, Classroom magnets, Refrigerator magnets, Industrial magnets, Fridge magnets, Craft magnets, DIY magnets and Hobby magnets. • Powerful Magnets: Incredible Holding Power for its Size, Grade N45 - Per Magnet Under Ideal Conditions, 7000 Internal Gauss. Stronger than N50