About this item Perfect Fit Compatible with WORX WG163, WG180 automatic feed trimmers and replacement for the original spool model WA0010. Cost-effective Get 6 replacement spools at less than half the price of the original parts, saving your money on repairs and maintenance. Time-Saving The pre-loaded spools come ready to use, eliminating the need for manual winding and saving your valuable time. High-Quality Material Each Worx weed wacker string is pre-wound with Enduring and high-strength 0.065-inch diameter nylon thread, providing long-lasting performance. Efficient Cutting Flexible trimmer spool allows line to stretch and cushion on hard surfaces, increasing cutting efficiency by 50% for more effective weed trimming.