This product is a rear T-Lock cable designed to restore smooth and reliable differential locking performance in your RC crawler. It is engineered for precise actuation to ensure consistent rear differential engagement during trail driving and rock crawling. The durable construction provides long-lasting operation under demanding off-road conditions. It is compatible with Traxxas TRX-4 Sport and related TRX-4 configurations that use part 8841 rear T-Lock cable for direct factory replacement.