Rare Earth Magnets Are Not Your Typical Refrigerator Magnet, These are Super Strong and Long Lasting!
These discs are axially magnetized, so the strong North/South poles are in the center of the flat sides. That makes them easier to stack into a cylinder than to connect side by side. The metal coating is durable, but ALL Neodymium magnets can chip or shatter.
If used gently, these magnets can serve your entire life.