The TRX-4 Brass Portal Knuckle Cover SAMtrx4-4013 is a high-quality tuning replacement part specifically designed for model building. This product is suitable for the TRX-4 model from Samix and offers improved performance and stability. The knuckle cover is made of robust brass, which not only increases durability but also optimizes the overall weight of the vehicle. With a part number of SAM-trx4-4013, this item is sold individually and is ideal for anyone looking to upgrade their model vehicles. The use of this knuckle cover can enhance steering precision and overall driving dynamics, making it a valuable addition for any model building enthusiast. The easy installation allows for quick and straightforward integration into existing models, making it suitable for both experienced model builders and beginners.