A grass trimmer is a gardening tool used to cut grass and weeds in areas that are difficult to reach with a lawn mower. It typically features a long shaft with a rotating cutting head at the end, which can be equipped with either a string line or a blade. This tool is ideal for trimming edges along fences, sidewalks, and flower beds, providing a neat and tidy appearance to lawns. Grass trimmers come in various types, including electric, battery-powered, and gas-powered models. Electric trimmers are quieter and more environmentally friendly, while gas-powered options offer more power for larger areas. Many trimmers also have adjustable handles and cutting widths, making them versatile for different gardening tasks.