Designed to test the hardness of Rubbers and Plastics. These sleek hand held hardness testers are crafted and engineered to perform at the highest level of accuracy. An ergonomic lightweight design assists in taking precise and consistent hardness measurements. These testers are crafted and engineered to perform at the highest level of accuracy. An ergonomic and attractive design combined with lightweight assists in taking precise hardness measurements. Shore D scale is for testing the following materials: Rubber: Hard Plastics: Harder grades such as rigid thermoplastics, Plexiglas, thermoploystrene, vinyl, sheet, cellulode acetate, thermosetting Laminates (ie Formica) Other: Paper filled calendar rolls, calendar bowls, etc. (materials that would not normally indent under fingernail pressure, such as a pocket comb or bowling ball).