Chinese made magnets in different lifting capacities are in fact the most available type of magnet in Iranian market. Lifting max 2 ton lifting industrial magnet that has the 2 ton nominal lifting capacity while being used on flat steel sheet with at least one cm thickness can have substantially less lifting capacity in lifting metallic objects with curvy surface. in fact one of the very important disadvantages of lifting magnets compared to other lifting equipment such as hoists is their lifting capacity dependent on the quality of surface.