Steel ring counterpart 12 x 5 x 3 mm is a ferromagnetic component used together with permanent magnets and magnetic fastening systems, with nickel surface protection. The product is not a magnet; it acts as a contact surface and helps close the magnetic circuit efficiently, which can improve holding force when installed correctly. The ring design allows simple screw fastening and is well suited to technical assemblies, magnetic closures, positioning solutions and industrial systems where a compact, durable and easy-to-install counterpart is required.