This entry-level range of microhardness testers primarily targets Vickers testing, but can also be used for Knoop and Brinell testing. The Duramin 4 testers are equipped with a combination of manual and automatic features to ensure easy operation. Duramin 4 is available in two load ranges; 10 gf – 2.0 kgf and 1.0 kgf – 62.5 kgf.