Iron plate has been processed by chromiuming, stainless steel and plastic, there are engineering plastic enhancement nylon 66 plusing fiber inside; Registering stainless steel polishing processing, combined with engineering plastic inside, with reasonable structure, high intensity, non-deformation, beautiful shape, convenient installation and so on. It is applicable to protect and decorate every kind of machine tools, machinery electrical appliance, hydraulic air-powered pipeline, guarantees safety of operators, and strengthens the competition of machinery equipments in international market.