Ring Magnets can be fixed in place using adhesive or can be pushed into circular drilled holes in wood or plastic.

Ferrite magnets offer a reduced strength of magnetism but at a very economical price.

A pack of 1 - 72mm O.D x 39mm I.D x 10mm thick Y30BH Ferrite Magnet. The NORTH pole is on one circular face and the SOUTH is on the opposite face. These Magnets do not require any protective plating

Each magnet can support a steel weight of up to 5.5kg vertically from the magnetic face when in flush contact with a mild steel surface of equal thickness to the magnet. Each magnet can also support up to 1.1kgs in a shear position before beginning to slide down a steel surface under the same conditions. These magnets are held in place by the Araldite/Loctite and have a maximum operating temperature of 180 degrees C.