These are Redcat factory replacement center drive shafts for the Ascent-18 Apex 1:18 scale rock crawler. The set includes both front and rear center driveshafts, each featuring a double-cardan style universal joint design for articulation through steep angles common in crawler use. Composite construction keeps weight low while providing the flex and durability needed for off-road crawling applications. Features: Includes front and rear center driveshafts Double-cardan universal joint design at each end Composite construction Designed for high-articulation crawler use 7/7/26 cs