The panels, and consequently the accessories dedicated to their anchoring, must be correctly selected both in terms of materials, thicknesses, and dimensions of the mirrors. Internal visibility must be guaranteed in all situations where supervision of production or maintenance personnel is required. The panels must guarantee the safety of the operators and the non-tampering of the systems, which is why the choice of material cannot and must not be dictated solely by habitual situations, aesthetic factors or economic savings, but rather be the result of a preventive analysis areas of risk, danger and need for intervention.