Straight styli with a ruby ball and a carbide stem have been developed for use on coordinate measuring machines and provide a reliable solution for demanding measurement applications. The combination of a carbide stem and a precision ruby ball offers maximum rigidity, high stability, and excellent measuring performance. The carbide stem is characterized by its exceptionally high stiffness and minimizes unwanted deflection, even at longer stylus lengths. This supports precise and repeatable measurement results. In addition, its high inherent rigidity improves measurement performance when using delicate stylus geometries and small ball diameters. The ruby ball is considered a proven standard in tactile metrology. Thanks to its high hardness, dimensional stability, and wear resistance, it is suitable for measuring a wide variety of materials and geometries. Ruby is one of the most widely used ball materials for tactile probing systems worldwide and offers an excellent combination of precision, cost-effectiveness, and durability. Due to the high rigidity of the carbide stem, this stylus design is particularly suitable for applications with increased accuracy requirements, as well as for probing systems with small ball diameters, where minimal stem deflection is essential for reliable measurement results. The product range includes styli with ball diameters from Ø0.2 mm to Ø1.5 mm, covering a wide range of typical measurement applications. Special sizes and customized versions can be requested at any time via our configurator or by email. The combination of a carbide stem and a ruby ball is the ideal choice for users who require maximum rigidity while benefiting from the proven properties of the standard ball material used in tactile metrology.