the traxxas 9740 metal servo horn is a direct replacement metal steering servo arm designed to eliminate flex and increase steering precision on traxxas trx‑4m 1/18 scale crawlers, helping improve durability and control compared to the stock plastic horn since it resists bending under load and provides a firmer link between the servo and steering linkage, this metal servo horn fits traxxas trx‑4m 1/18 ford bronco and trx‑4m 1/18 land rover defender models and is ideal for hobbyists looking to maintain or repair their small scale rc crawler’s steering performance.