How do iron keepers prevent magnets from losing their magnetism?

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How do iron keepers prevent magnets from losing their magnetism?

• Iron keepers absorb magnetism.
  Qn. State the law of magnetism.
• Like poles of a magnet repel while unlike poles of a magnet attract each other.
  Qn. State the laws of a magnetic field.
• Magnetic lines of force run from the North Pole to the South Pole.
• Magnetic lines of force do not intersect within each other.
• There is no line of force within the magnet itself.
  Qn. State the differences between iron and steel as magnetic materials.
• Iron gains magnetism easily while steel takes long to gain magnetism.
• Iron loses magnetism easily while steel takes long to lose magnetism.
• Iron is used to make temporary magnets while steel is used to make permanent magnets.