Rockwell hardness tester is the first Rockwell hardness tester in the world designed on the basis of Rockwell hardness test principle. The hardness of metal can be tested only by contacting the sample on one side. The probe of Rockwell hardness tester is adsorbed on the steel surface by magnetic force without supporting the sample.Rockwell hardness test uses three kinds of indenters and six kinds of test forces. According to the different materials, hardness range and size of metal materials, there are 15 scales to choose from, which can test almost all common metal materials from very soft to very hard, and the application range is very wide. Rockwell hardness tester has been widely used in industrial production. It has become the main means to inspect the product quality and determine the reasonable processing technology. It can test all kinds of black and non-ferrous metals, as well as the hardness of quenched steel, tempered steel, annealed steel, surface hardened steel, plates of various thicknesses, cemented carbide materials, powder metallurgy materials and thermal spraying coatings.