12mm Lock-pin Style Aluminum Wheel Hex (Red), for Traxxas Stampede, Rustler, Bandit and Slash. Using high quality CNC machined aluminum, these lock-pin style aluminum wheel hex locks down on the axle pins so loosing pins are no longer a problem for your Traxxas electric Stampede, Rustler, Bandit or the Slash. Aluminum hex are also more durable and less likely to strip out and provides a better fit to the wheel hex.