The WORX cordless 20V Max Lithium powered String Trimmer delivers new levels of power, precision & function. Those 20V & 4.0 amp hours of max Lithium battery power give the WG170.1 gt revolution longer run times & more power. The 12″ Cutting diameter means more trimming in less time. Convert to an edger in S, with dual-positioned in-line wheels that make edging A breeze. The innovative command feed Instant line feeding system keeps you productively moving on your lawn projects. Make easy height adjustments to the telescopic shaft using the quick-release trigger lever. Turn the trimmer head with an easy pull & turn to lock & convert to edging in S. The max Lithium battery power means More battery capacity, longer run times, no self-discharge, no slow loss of power, less weight, more power & quicker charging times. Charge the battery within 3 hours & it’ll be ready when you need it with no-self discharge. From function to features, the 20V WORX gt revolution features 100% single-line feed which means no bumping to extend the line. An adjustable space guard not only helps protect vegetation, it also acts as an edger guide. A front Auxiliary handle has 7 locking adjustments for maximum comfort while trimming, edging, or mowing. Weighing in at less than 6 lbs., the GT 20V trimmer & edger lets you create a professional-looking yd with less work, less fatigue & in less time.