This listing includes one piece of round base magnet which is made of a ceramic ring magnet and a chrome plated steel cup. The ceramic ring magnet is bonded inside of the cup with adhesives. This arrangement greatly increases the holding power of the magnet and at the same time provides the protection to the magnet greatly increasing its durability.
The holding power of this magnetic assembly is about 210 LBS with a direct contact with the steel. The outer diameter of the magnet is 4.9" (125 mm). The mounting hole in the center is 0.51" (12.95mm) which allows a 0.5" screw pass through. The total thickness of the assembly is 0.5" (12.7mm).
The applications of this cup magnet include magnetic holding, lifting, antenna Mounting, positioning, retrieving and much more.