Makita LXT 18V Li-Ion Brushless Cordless 13 in. String Trimmer Tool Only w/ bonus 0.08 in. x 175 ft. Twisted Trimmer Line XRU23Z-T-03866 - The Home Depot
Replace / Install new string trimmer line - single line Makita XRU02Z weed whacker - YouTube
How to Change the Spool on a Makita Weed Trimmer | Hunker