The spool is inserted into the Stihl Autocut C 3-2 mowing head and allows a thicker diameter nylon line of 2 mm to be used for the Stihl FSA 57 line trimmer. The mowing line is automatically extended by tapping the head on the ground and there is also an easy nylon loading feature. This spool is suitable for the battery line trimmer FSA 57, it is not compatible with the mowing head that comes standard with the tool.
