To measure the Shore D scale hardness of specimens and articles of hard rubber and its derivatives, according to DIN 53,505, UNE-EN ISO 868 and ASTM D-2240. Used in the following types of materials: Hard thermoplastic, hard rubber and plastic high hardness, plexiglass, polystyrene, sheet vinyl, cellulose acetate, thermostatic and laminated formica. Graphite, etc.