Specialized testing equipment category for measuring material hardness. Includes various hardness measuring devices compliant with JIS and ISO standards such as Rockwell hardness testers, Vickers hardness testers, Brinell hardness testers, and Shore hardness testers. Essential measuring instruments for evaluating mechanical properties of materials in quality control of metal materials, resin materials, and rubber materials. Used for quality confirmation after heat treatment, incoming inspection, and product specification verification, widely utilized in manufacturing sites for automotive parts, machine parts, and tools. Different from surface roughness meters and tensile testing machines in measurement principle, specialized in hardness value measurement through indentation.