2-line line head with semi-automatic line feed. Perfect for tidying up fences, flower beds, walkways, etc. Works quickly and efficiently. The length of the line is adjusted by tapping the end of the line lightly against the ground. Incredibly easy line filling. Insert the end of the new line into the fishing line and then you just turn the adjustment wheel when the whole line has been wound onto the fishing line. A grass cover must be used with all line heads.