The trimmer head where the drive line of the electromotive tool is connected to the core component. The spool is installed in the core component, is driven directly by the core component. In order the housing axial direction to slide on the core component, the housing it is moved to axial direction vis-a-vis the core component it is installed, by the spring. By the gearing structure on the spool and the housing, the spool and the housing are done responding to the pushing by the spring, being joint, in order to turn, gearing. Cancellation of gearing structure is brought by opposing to the pushing by the spring. In order for gearing to be cancelled by only automatic operation and hand, it passes through thing, and the line where the spring selectively takes alternation position to both ostiums and the spool to desirable another feature, that in order winding to do, penetrating the spool on the spool by turning by hand vis-a-vis the housing, the line installation miscellaneous function which is offered both ostiums and by the tubular support which is the alignment of the housing possible is included the spool.
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