The MAX RB70404 Arm B Unit provides support and stability for the wire guide on compatible rebar tying tools. This replacement component helps position the wire guide correctly around rebar during tying operations, supporting consistent and accurate wire placement. It is designed for use with compatible MAX rebar tying equipment and can be used when the existing arm unit becomes worn or damaged. Proper installation helps maintain the intended movement and positioning of the wire guide during operation. The unit provides a practical replacement solution for maintaining compatible rebar tying tools during construction and reinforcement work.