HT300 is the tester with the printer, which is convenient for users to print the test results. It is the most cost-effective portable hardness tester. The instrument is designed with a streamlined ergonomic structure and is equipped with a standard stand. It uses a large-screen OLED 128*64 dot matrix display, which is informative and intuitive. No dead ends, easy to operate and read values. Applicable materials: steel and cast steel, alloy tool steel, stainless steel, gray cast iron, ductile iron, cast aluminum alloy, copper-zinc alloy (brass), copper-tin alloy (bronze), pure copper, forged steel.