Compatible with most BLACK+DECKER string trimmers use the spool line AF100 3ZP Compatible with: BESTA510, BESTA512, BEASE620, CST1000, CST1200, CST2000, GH400, GH500, GH600, GH610, GH900, GH912, LST120, LST136, LST140, LST201, LST220, LST300, LST400, LST420, LST522, LST1018, LSTE522, LSTE523, LSTE525, NST1018, NST1024, NST1118, NST1810, NST2018, NST2118, ST7000, ST7200, ST7700, ST7701, ST8600, ST9000 Weed Eater Head Fixed Dual Heavy Duty Blades with 12 Pack Replacement Blades AF1003ZP Includes a 0.065 inch diameter line;30 feet replacement line is factory wound for a superior feed, For Best Use the trimmer head suggest to use for trimming & mini mower,Not recommended for edges Recommend using Spool Line for edge trimming Avoid using the TRIMMER HEAD for edging, working alongside brick, chain, or wooden fencing Can use WETOOLPLUS WTA0027 Quick Change Blade Made by WETOOLPLUS, one of the most trusted brands for Garden Power Tools & Accessories. Trimmer Head with Blades & Spool Line Compatible with BLACK+DECKER Grass Trimmer use the spool line AF100 3ZP