The Quickload spool is compatible with most Black and Decker models including BESTA510, BESTA512, BESTE620, CST1000, CST1100, CST1200, CST2000, GH400, GH500, GH600, GH610, GH900, GH912, LCC140, LST120, LST136, LST140, LST201, LST220, LST300, LST400, LST420, LST522, LST1018, LSTE523, LSTE525, MTC220, MTE912, NST1018, NST1024, NST1118, NST2018, NST2118, ST6600, ST7000, ST7200, ST7700, ST7701, ST8600, and ST9000.