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 A scale is for testing the following materials: Rubber: Soft vulcanized (ie tyre), natural nitrile Elastomeretric materials (rubber & rubber like): GR-S, GR-1, neopene, thiokol, flexible polyacrylic esters neoprene, thiokol, flexible polyacrilic esters. Other: Wax, felt, leather etc. (materials that normally yield under fingernail pressure, such as the heel on your shoe).