Ordered just to get another spool for modification to .080" line. To modify, use a .080" screw to change one of the holes in the top of the spool.  Twist in the new .080" line.  Manually rewind the line unto the spool (not hard & it doesn't take long). Put the end of line in the slot after winding so it doesn't unwind. B&D must have had the razor blade concept so successul for Gillette in mind when they made their weed eater. As in, price the weed eater cheap, and then sell a lot of line spools. They could just as easily used .080" line to begin with, but then the line would last too long.