Magnetic hook (magnetic holder) is composed of eternal magnets and metal parts of the special magnetic circuit. They are better than single magnet of magnetic force strong many times, vertical suction can reach 5-150 kg, is fixed product ideal choice. This company produces the magnetic retainers are widely used in office, family, tourist sites, industrial and engineering field. It clean and free of environmental pollution and easy to use. We design and development of this kind of product is modelling beautiful, with makings fastidious, reasonable design, preferential price, etc.