This value-pack of (3) pre-wound trimmer spools is a simple and convenient solution for a Radley 20-Volt Max auto-feed cordless trimmers (HH #5073-356, 5073-357 and 5073-047, all sold separately). Simply remove the old spool, replace it with a new pre-wound spool and you're ready to get back to work! The durable 0.065" twisted trimmer line is optimized for cordless trimmers, efficiently slicing through weeds without compromising your battery life.