Vibrating screens for use in the mining industry; screens for mounting to agitators in mineral processing plants and similar; screens for use in separating rocks, soil and materials extracted from the earth; screens for use in processing assemblies; panels for sieving materials, the panels adapted for mounting to machine driven agitators; machines and machine tools; separators, sifters, sieves, shutes and screens; mineral and oil processing machinery and systems and parts; components and accessories in this class for mineral and oil producing machinery and systems; screen rails, pins, mounting components and retaining assemblies for use with screens, all in this class