Greenworks PRO 20V 12 String Trimmer tool only Twist to edge coupler with pivoting head offers trimmer and edging capability Gas free cordless design means less maintenance, zero fumes and lighter weight 12-inch cut path with .065 single line auto feed Compatible GreenWorks Replacement Spool, Model 29252 and 29092 Battery and charger sold separately. Compatible battery model, 29332 and 29372