A string trimmer, also known as a weed eater or line trimmer, is a gardening tool used for cutting grass and weeds in areas that are difficult to reach with a lawn mower. It features a long shaft with a rotating head that uses a flexible nylon line to trim vegetation. String trimmers are ideal for edging along sidewalks, fences, and flower beds. These tools come in various types, including gas-powered, electric, and battery-operated models. Gas-powered trimmers are typically more powerful and suitable for larger areas, while electric and battery-operated options are quieter and easier to maintain, making them ideal for residential use.