GreenWorks 21132 Gen1 40V String Trimmer - Tool Only GreenWorks Gen1 40V Lithium-Ion battery performs at maximum power for the best lawn care results with innovative fade free power 12 -inch cutting path allows you to manuever through your yard quickly and efficiently .065 single line auto feed for easy line advancement Multiple position pivoting head and easy edger button with guide wheels offers user comfort and versatility when trimming at multiple angles Tool Only: Compatible with GreenWorks 40V Batteries, Models 29302 and 29282