Type A and Type D hardness testers - Type A for low to medium hardness materials; Type D for high hardness materials. This dual-model setup lets you cover a wide range of test subjects with one instrument. - Easy and precise operation: Place the sample on a sturdy surface, hold the hardness tester, and press the foot of the pressure firmly on the sample with a distance of at least 12m from the edges of the test sample. Ensure the pressure needle is vertically pressed into the sample and keep contact for 1 second before reading. - Accurate measurement procedure: Measure the hardness value 5 times at different positions with a distance of at least 6 mm between test points, and use the average value for the final result. - Durable and reliable: ABS plastic housing provides a sturdy, easy-to-use hardness tester that delivers dependable results for professional use. - Broad applicability: Suitable for professionals in quality inspection, factory production lines, and laboratories. Designed for automotive manufacturing, mechanical processing, and other industries, as well as laboratories in schools and research institutions. - Wide material compatibility: Can be used to test the hardness of metals, plastics, rubber, and other materials, making it applicable to a variety of testing scenarios. - Use scenarios - Automotive manufacturing quality control: verify hardness of metal components to meet spec during production. - Mechanical processing and material selection: assess material hardness to inform tooling and process parameters. - Educational and research settings: convenient tool for school labs and research facilities to study material properties.