FIRST4MAGNETS Ferrite Black Painted Clamping Magnet with M4 Hook for Hanging, Holding or Displaying Items - 57mm Dia - 25kg Pull - Pack of 40

• IDEAL FOR HANGING & DISPLAYING. Ideal for hanging signs and decorations from a steel ceiling and is commonly used in shops to suspend advertising signs.
• STEEL SHELL. The steel pot increases the adhesive force of the magnets giving them an incredible hold for their size.
• STRONG FERRITE MAGNET. Each magnet can support a steel weight of up to 25kg vertically from the magnetic face when in flush contact with a mild steel surface of equal thickness.
• SPECIFICATIONS. 57mm diameter x 34mm high. The internal diameter of the hook is 4mm and is 18mm from the tip of its thread to top.

Pack of 40 57mm diameter x 34mm high 2% tolerance The internal diameter of the hook is 4mm and is 18mm from the tip of its thread to top Each magnet can support a steel weight of up to 25kg vertically from the magnetic face when in flush contact with a mild steel surface of equal thickness Black powder coated finish These discreet, gloss-black ferrite hook magnets are great value for money and ideal for hanging signs and decorations from a steel ceiling and are commonly used in shops to suspend advertising signs. The ferrite magnets are sunken in to a steel shell meaning that the north pole is on the centre of the magnetic face and the south pole is on the outer edge around it. The steel pot increases the adhesive force of the magnets giving them an incredible hold for their size.