The brushcutter head is basically a support or trimmer holder. It is usually an openable shell in which the thread is wound on a spool. The most common are the "knock and go" heads, to extract new line when it is worn out, instead of stopping and turning off the brushcutter to extract it by hand, you just need to hit the knob of the head on the ground while the machine is running and without interrupting the job.

In addition to the classic shell brushcutter heads, there are multi-line heads capable of optimizing the life of the line, which wears out more slowly. Unlike the other heads, which use the wound continuous line, in the multiline you ensure more lengths of line in the fixing systems that you buy ready or cut yourself from the line spool for brushcutter.