Abstract: A line for a rotating trimmer has a plurality of longitudinal outwardly-extending cutting edges, spaced circumferentially about the main body portion of the line. A cross-sectional area of the main body portion is selected to be between 70 percent and 90 percent of the area of the space circumscribing the cutting edges to provide substantial bulk to the line to increase its wear, while retaining the advantages of the cutting edges for facilitating cutting of grass and the like.

Abstract: A monofilament line for a rotating string trimmer has a main body portion of a generally circular configuration. One or more sharp longitudinal cutting edges are integrally formed with the main body portion and protrude from the main body portion at an angle selected to cause controlled flex and asymmetrical drag on the cutting element, as it is rotated by a rotating string trimmer. This causes a torsional rotation of the free end of the line as it is rotated; so that the main body portion of the cutting element first strikes the object to be cut, followed by contact with the sharp cutting edge. This configuration is selected to cause cleaner cuts of grass and the like, with less shredding of the cut ends of the grass blades. In addition, larger vegetation such as weeds and small stalky shrubs may be efficiently cut without abnormally high wear of the cutting line.