🚧 What is the International Roughness Index (IRI)? The IRI measures road smoothness to ensure safer, more comfortable rides. Smoother roads mean a better experience for everyone! #InternationalRoughnessIndex | Civil Engineering World

What is surface roughness tester used for? A roughness tester is used to quickly and accurately determine the surface texture or surface roughness of a material. A roughness tester shows the measured roughness depth (Rz) as well as the mean roughness value (Ra) in micrometers or microns (µm). https://www.penntoolco.com/mahr-marsurf-ps-10-mobile-roughness-measuring-instrument-2-m-6910230/ #surfaceroughnesstester #metalworking #machineshop #cncmachining #machinist | Penn Tool Co