Abstract: A rotary head for string trimmers having a rotary body with a rotation axis and manufactured as one single piece; wherein the rotary body has one or more return areas, each of which is configured to lock a respective line portion by means of consecutive curves on different planes.
Abstract: A rotary head for brush cutters with a lower shell on which cutting means and a ring nut are hinged, the latter being coupled to the lower shell and movable in relation to the lower shell from a first working configuration to a second blade-change working configuration, and vice versa; the rotary head having positioning means for interference fitting said ring nut in a predetermined angular position relative to said lower shell.