The spool is inserted into the STIHL AutoCut C 3-2 mowing head, which is designed for mowing and thinning work. The 1.6 mm mowing line is automatically extended by tapping the head on the ground and there is also an easy nylon loading feature.

This spool fits in the standard mowing head for the FSA 57 Battery Line Trimmer. It can also be used on the STIHL FSA 30.