The FENIX 300U is a versatile universal hardness tester designed for users who need Rockwell and Superficial Rockwell testing, with the added flexibility to perform Vickers, Knoop, and Brinell when required. It is ideal for workshops that primarily run Rockwell tests but occasionally need additional scales, as well as technical schools, universities, and multipurpose laboratories.

Its electronic microscope, equipped with interchangeable lenses and a ring light, provides sharp, easy‑to‑read images—perfect for measuring shallow Brinell indents with accuracy and simplicity.