Compatible Black & Decker String Trimmer Models:GH400,GH500,GH600,GH900, GH912,ST6600,ST7000,ST7700,CST1000,CST1200,CST2000,MTC220, MTE912,NST2018,NST1118,NST2118,LST220,LST300,LST400,LST420,LST136
Easy to Install:
1.Turn off the trimmer and remove the spool cap.
2.Replace the spool into the trimmer head.
3.Snap the line in the slot and line it up with the retainer.
4.Cover the cap.
Kindly Note:
1. It is necessary to wear goggles and long pants to avoid injury from spilling lines.
2.Turn off the trimmer before changing, installing, or removing the spool.