1. Compatibility: For 1/10 RC Crawler TRX4 TRX4 2. Durable Construction: This metal upgrade accessory set for RC cars features quality aluminum alloy parts, delivering exceptional strength and durability. The rugged design ensures wear resistance, making it ideal for enhancing the longevity and performance of your RC vehicle even under intense conditions. 3. Enhanced Performance: Upgrading to this metal accessory set significantly improves the handling and stability of your RC car. Components such as shock absorbers and control arms are designed to provide better shock absorption, precise control, and smoother operation, thereby enhancing the overall driving experience and performance across various terrains. 4. Precision Fit: Every part in this upgrade kit is engineered for a precise fit with RC car models. Whether you're upgrading suspension arms, steering knuckles, or drive shafts, the components are designed to integrate seamlessly into your existing setup, ensuring hassle installation and reliable performance.