The Phase II Plus SRG4500-200 deep groove stylus measures surface roughness in slotted or grooved workpieces. It is for use with the SRG-4500 surface roughness tester (sold separately).
Phase II Plus manufactures precision measuring instruments, machine tools, and material testing equipment for industrial engineering and manufacturing environments. The company, founded in 1981, is headquartered in Upper Saddle River, NJ.