A reversible line blade for a rotating trimmer includes a loading section configured to be securable for rotation with a head of the rotating trimmer, a living hinge extending from the loading section, and a transition section extending from the living hinge and having a first cross-sectional shape with matching leading edge and trailing edge geometries. A cutting segment extends from the transition section and has a second cross-sectional shape that is different from the first cross-sectional shape. With matching lead edge and trailing edge geometries, the same line blade is functional for both clockwise trimmers and counter-clockwise trimmers.