The job decides the type
Lawn mower — open lawn
A mower is for a large, even lawn. It does the main work quickly, but it does not reach edges or tight corners.
Trimmer — edges and tight spots
A trimmer is for edges, flower beds and places the mower cannot reach, such as along fences and walls.
Brush cutter — thicker growth
A brush cutter suits thicker grass and young shrubs — where a light trimmer line will struggle.
Pressure washer — not for grass
A pressure washer is not a grass tool. It is for terraces, paving and cars.
Chainsaws are not part of this helper — they are a separate direction. Here we focus on lawn, edges, brush and washing.