This product includes two pairs of quick-release links, totaling four pieces, designed for KMC, Shimano, and SRAM chains. They are compatible with 9-speed bicycle chains and offer tool-free installation due to their durable steel construction. The links are reusable and have a standard 1/2" x 11/128" chain pitch with a 6.6mm pin length. They are sold as a pair. The EcoProTeQ coating provides twice the rust protection compared to RB coatings and offers a high-quality aesthetic. KMC aims to set new standards in rust protection with this product. Color: Silver.