These Kyosho factory replacement 5.8mm pivot balls are designed for the KC10 platform and are sold as a set of 8 pieces. Pivot balls serve as the interface between suspension links and uprights or other suspension components, allowing articulation while maintaining precise geometry. Having a full set of 8 on hand covers a complete vehicle rebuild or keeps spares ready for track-side repairs. Features: 5.8mm pivot ball size Set of 8 pieces Metal construction Designed for Kyosho KC10 platform 7/7/26 cs