Upgrade or replace the servo arm on your Traxxas TRX4M 1/18 scale RC crawler with this KingVal part. It's a 25-tooth (25T) servo horn made from high-quality aluminum alloy using CNC machining, so it's precise, strong, and looks cool with its black and red finish.

It's a direct fit for the stock servo on the TRX4M. Aluminum is much more durable than plastic, so it's less likely to strip or break when you're tackling tough terrain. Installation is straightforward – just swap out the old one. A simple upgrade that improves reliability and adds a bit of custom style to your tiny truck.