Features: High quality aluminum alloy material, not easy to deform, long lifetime Nice spare parts to upgrade your RC car, effectively improve the performance of your car Made lightweight, optimized structure, shorten the shift time Replacement of 3985x with cnc customized one to improve strength and eliminate the false position of the gearbox, no stuttering in driving Specification: Material: Aluminum Alloy Size: as Shown Quantity: 1 PCS Application Model: for Traxxas Summit Package: 1x Transmission Shift Driver Note: Only the above package content, other products are not included.