Precise TH 170 - Metal Hardness Tester - Precise Metal Hardness Tester is a small, light and portable tester. This hardness tester is mainly used for testing heavy, big or outdoor metal parts. It is also used in the production line of mass-produced components, material identification in stores and warehouses, and in confined spaces and hard to reach areas. It has an upper and lower limit setting with an automatic switch-off option. The backlight is for convenient use in darkness with software calibration and battery capacity display.