Two lines can be fitted. The larger DuroCut 40-4 can use four lines when fitted to Stihl's clearing saws.
Complementing the new head, a serrated long-life mowing line has been developed for aggressive cutting through long grass and weeds. It is supplied in pre-cut lengths of three diameters to fit DuroCut heads.
In addition to the Stihl mowing line range, the DuroCut 20-2 and 40-4 cutting heads can also carry a new, wider 4mm round mowing line, supplied on a 32m reel for cutting prior to use.