VEVOR Rail Mill Guide System, 9 ft Milling Guide, 4 Crossbar Kits Chainsaw Mill Rail Guide, Aluminum Adjustable Saw Mill Rail System Work with Chainsaw Mills for Builders and Woodworkers
You can add this rail to the VEVOR Chainsaw Mill and Rail Mill Guide System to make longer boards.But it is not recommended to do so, as the board being too long can lead to larger product errors.