The Schwanog WSI system enables internal grooving, internal turning or both manufacturing steps in a single operation. The tool holders are equipped with internal cooling, usually diameters > 2 mm can be realized. The internal grooving inserts are continuously adjustable in length by means of an adjusting screw in the Z-axis, thus offering optimum stability and functionality when setting up and changing tools. The changing accuracy of the WSI system is 0.02