If you need to mow some heavy bushes and the normal fishing line in the trimmer is not up to the task, then you can try a chain head. The diameter of the mounting hole is 25.4 mm. The chain, due to its weight, will cut down even hard growths. However, it should be considered that with such an attachment, the load on the gearbox of the brush cutter increases several times. Therefore, it is not recommended to use this head regularly.