This Worx trimmer is an electric trimmer, cordless trimmer with built in battery, no problems with line, no fuel mixing, no gas. This grass cutter has fast spool change system, line feed is 100% automatic, string trimmer diameter: 10". Worx GT grass trimmer can be converted to edge and back within a few seconds. Adjustable, rotating handle of weed trimmer provides high comfort, string trimmers' shaft is telescopic to adjust your posture & height. This lawn edger is easy to handle, lightweight and well made.