the hook itself is not stainless

The round notch will assist you in removing smaller disc magnets and bar magnets

see more here

Choose a bigger one instead if you are looking for glass board magnets

red symbol magnets with numbers are perfect for the office but also for school purpose (makes learning math a little more fun)

Stærk symbol-magnet, Rød Rund (0) 3M the hook itself is notRed magnet with the number [0]. Round, red symbol magnets with numbers are perfect for the office but also for school purpose. Makes it easy to see from a distance for date indication, calculations or on LEAN boards etc. that needs number cero. Diameter: 3. 26 cm. Height: 0. 9 cm. Strength: 1. 5 kg. Color: red with white printing The prices are unit prices. Volume discount available. The magnetic symbols are printed on demand. Therefore, please allow