1.Designed for automotive manufacturing, mechanical processing, and other industries, as well as for laboratories in schools and research institutions. 2.A and D are suitable for hardness testing of low to hardness and high hardness materials, respectively. When placing the sample on a sturdy surface, hold the hardness tester, and press the foot of the pressure firmly on the sample at a distance of at least 12m from the edges of the test sample, so that the pressure needle is vertically pressed into the sample until the foot of the pressure and the sample are completely in for 1s before reading. 3.With easy operation and accurate results, this ABSmade hardness tester is suitable for quality inspection, factory production, and laboratories. 4.This versatile hardness tester can be widely used in testing the hardness of metals, rubber, and other materials, making it applicable to a variety of scenarios.