These Exotek hinge pins are designed for the rear arms of the RC10 Classic and feature a bolted design for secure retention. The pins are steel with a nitride finish, which provides increased surface hardness and corrosion resistance compared to uncoated steel. The set includes 4 hinge pins along with the matching nylon lock nuts needed for installation. Features: Steel construction with nitride finish for added hardness and corrosion resistance Bolted design with nylon lock nuts included Set of 4 rear arm hinge pins Designed for the RC10 Classic platform 7/7/26 cs