An edge trimmer or lawn edger is a garden tool, either manual or motorised,[1] to form distinct boundaries between a lawn, typically consisting of a grass, or other soft botanical ground cover, and another ground surface feature such as a paved, concreted or asphalted area, or a granular material such as sand or gravel, or simply uncovered soil, for example an unbounded garden.
[citation needed] Typical situations for the use of lawn edgers are to define clean boundaries, and stop grass incursion, between lawns and walkways or gardens in private properties and public areas, and between sand traps and greens or fairways on golf courses.
[citation needed] Purpose-designed manual spade-based lawn edgers are a half-moon-shaped, semicircular, broad blade attached to an elongated handle, and are used in a downwards and rocking motion.
[1][5][6] Some string trimmers are designed so that they can be easily maneuvered with their head being positioned vertically instead of the default horizontal.
Other string trimmers come with specific lawn edging attachments, or the one head can be pivoted to be realigned vertically.