The HART 20V 10” String Trimmer is the perfect string trimmer kit to fulfill your light-medium duty trimming needs. The 10” auto-feed head requires no bumping and releases approximately ¼” of line every time you release the trigger, and easily switch your trimmer into a dedicated edger by rotating the shaft. Auto-Feed Head compatible with HART .065 Line and Spool. The included HART 20V Battery is compatible with all HART 20V tools. The HART 20V 10” String Trimmer is covered by a 3-year limited warranty.