1.Based on the principle of measuring the Leeb hardness, it can be measured in a variety of metal materials. 2.Easily switch to the hardness of all formats (HL,HB,HRB,HRC,HRA,HV,HS), parallel conversion of the measured value of the hardness 3.Using the big screen 128 x 64 graphics dot matrix LCD display, information is rich, intuitive. 4.With bright backlight display, easy to use in the light gray environment. 5.A host can be equipped with 7 kinds of different impact device, automatic identification of impact device type. No need to re calibrate the replacement.