Cylindrical styli measure two-dimensionally and are particularly suitable for thin sheets. Narrow workpiece edges can also be measured well with cylindrical measuring probes. However, the probe axis must be mechanically aligned very precisely with the feature axis on the workpiece. As a special form, spherical cylindrical styli are available, which are also mostly used for sheet metal measurement and measurement at sheet metal edges. They have spherical end and can thus additionally determinde the flatness of a surface, for example.