Strength magnets: Holding force depends on the surface structure. Useful practical thing as magnets for bulletin board or magnets fridge for fridge organization Magnetic Material: It will be firmly attached to the refrigerator thanks to its soft powerful magnets. Easy to install on any metal surface fridge stove dishwasher etc. Magnetic needles for bulletin boards or magnets for magnetic boards are useful accessories in teaching materials office use arts and crafts and home improvement. The best part is it doesn't leave holes on your magnetic surface ESTIMATED DELIVERY TIME:International package takes about 25-40 days to ship to destinationif the parcel has not arrive within expected timePlease . No Scratches on the surfaces: These handy magnets work well on file cabinets or metal presentation boardsthey can hold several A4 sheets of paper at a time