WORX GT WG151.5 18-Volt Lithium Ion Cordless Electric String Trimmer/Edger With Quick Charger In-line edging: Convert the GT trimmer into a walk-behind edger and vice-versa in a matter of seconds. Protection included: An adjustable spacer guard protects plants, flowers and garden furniture from damage while trimming. 90-degree tilting shaft orients the cutting head for sloped and hard-to-reach areas. 100% automatic single-line feed for best cutting performance. Lithium-ion battery technology: long life, no self discharge, light weight and no memory effect.