The HR-430MR Rockwell digital hardness tester has an automatic brake-start function prevents overloading of the initial load and begins the test cycle. Test forces are selected by the convenient dial a weight system. The high contrast LCD display shows success or failure decision function, offset function, and hardness conversion functions. Light force Brinell hardness tests can be performed by using the following optional accessories: Brinell indenter, weight set and a measuring microscope.