Features [M2 Thread] The red ball diameter is 0.7mm, and the total length is 20mm long, with standard M2 thread, the probe stylus is easy to install. [Long Life] The red ball at the end of the probe stylus has a long service life, and will not wear the surfaces of the abrasive material. [Straight Design] The probe stylus features straight design, used for inspection of simple features, can direct, unobstructed contact the measurement surfaces. [High Rigidity] The shank is made of tungsten carbide, which provides exceptional rigidity for this probe stylus with small ball and stem diameters. [With Storage Box] Comes with a storage box, prevent the probe tool from being lost or accidentally damaged, and is easy to carry. Specification: Item Type: CMM Touch Probe Stylus Material: Tungsten Carbide Thread: M2 Application: 3 coordinate machine tool stylus Package List:1 x CMM Touch Probe Stylus 1 x Storage Box Note:Please allow slight size error due to manual measurement. Thanks for your understanding. Package List 1 x CMM Touch Probe Stylus 1 x Storage Box