This is the GPM Racing Gunmetal Aluminum Steering Bellcrank and Servo Saver for Traxxas 1/10 Slash 4x4, Rustler 4x4, Stampede 4x4, 1/10 Rally, and Telluride trucks. These are made of 6061-T6 aluminum for strength and durability. They look great, and feature a threaded adjustment nut to adjust the spring tension on the servo saver.