40x20mm Neodymium Magnets Large Round Heavy Duty Rare Earth Magnets for Fridge, DIY Projects, Crafts, Office, Science, Tool Room One Piece High Power Magnetic Hold

40x20mm Neodymium Round Magnet Heavy-Duty One Piece
✔️ 40 mm dia, 20 mm thick NdFeB with Ni/Cu/Ni triple coating, silver

This is a single, high‑power neodymium magnet designed for strong magnetic holds and display tasks. It works great on refrigerators, metal boards, and in DIY or classroom settings where a reliable pull is needed.

✅ Size and strength: 40 mm dia x 20 mm thick (1.57 in x 0.79 in) NdFeB
✅ Coating: triple Ni/Cu/Ni for corrosion resistance and a smooth silver finish
✅ Power and durability: high magnetic pull with resistance to demagnetization
✅ Use cases: fridge notes, curtain clips, office organization, crafts, teaching tools
✅ カラー：シルバー

💡 What is a strong neodymium magnet used for in DIY projects and classrooms? This handy magnet provides a powerful grip on metal surfaces and is handy for organizing, displays, and experiments. - Handy for fridge notes and metal surfaces - Great for classroom demos and lightweight tool mounting - Helps organize papers, photos, and crafts on metal boards