The 68.0-57.1 set of four spigot rings is a reliable and high-performance solution for installing spigots in alloy wheel hub bores, providing a perfect fit for centric wheel spacers. These rings are made from a durable, heat-treated alloy and feature precise internal threads for secure installation. The set includes four rings in two sizes, allowing for easy replacement or custom-fitting. The slim profile and smooth surface ensure a low-noise ride while offering ample clearance for wheel nuts. With their precision design and reliable performance, this spigot ring set is a must-have for anyone looking to upgrade their alloy wheel hub installation.