Magnetic assemblies are components made from permanent magnets and steel parts (and/or some non-ferrite magnetic insulate materials, such as Brass and Aluminum) fixed or bonded together. Thanks to the magnetic field design, a magnetic assembly has a particular magnetic circuit that can concentrate or insulate magnetic power at a target space around the magnetic assembly. In this way, magnetic assemblies can be utilized for holding, retrieving, moving, lifting and mounting steel parts in different industrial applications.