The HART 4-pack of .080” line and spool is the perfect way to quickly and conveniently reload line into any auto-feed trimmer. This pre-spooled line is the expedient solution that will get you back to maintaining the lawn of your dreams in no time. The HART 4-pack of .080” Line comes pre-loaded on a spool so when it comes time to reload your trimmer simply pop the cap off the trimmer head, remove the old spool and load the new pre-loaded spool and feed the line through the easily accessible hole in the trimmer head. Then just place the cap back on the trimmer head and you will be good to go! This trimmer line is designed for durability and cuts through any grass or weeds you may encounter in and around your lawn or garden. This spool is compatible with all HART auto-feed trimmers Including the HART 13” String Trimmer and the HART 40V 12” String Trimmer.