This neodymium ring magnet measures 1/2" (OD) x 1/8" (ID) x 1/4" (T), and has a pull force of 3.9 kg. It has a countersunk hole through the NORTH face which is sized for a #4 screw. GRADE N38.
Uses for magnetic rings:
These countersunk ring magnets are used in school projects and productions, as well as advertising and display companies for the purpose of presenting products, services, and signage. They are also used in kitchen and bathroom cabinetry and countertops, secret fixing, and soft door closures using magnetic hold and release. Magnets are widely used in the construction industry for holding, fixing and releasing of different materials including stone, timber, ceramics, plastics, and fabrics.