The Right Hand Inner Jaw 3990 is a precision-engineered component designed for REX International machinery. This inner jaw is crafted from high-strength materials to ensure durability and reliability under heavy use. Its dimensions are specifically tailored to fit the 3990 model, providing a secure and efficient connection. This part is essential for maintaining the functionality of your equipment, ensuring smooth operation and compliance with industry standards. Upgrade your machinery with this high-quality replacement part.