The Rockwell test method is the most commonly used hardness test method since it is generally easier to operate and can be experimented the result directly. Rockwell hardness testers can be used on all metals. Along with development of machine-driven industry, Rockwell hardness test is widely used.The Rockwell hardness tester consists of a diamond cone and a 1.588mm hardened steelball indenter. According to the need of the customer, we can provide a 3.175mm hardened steel ball indenter.