SOAK 24-HOUR Ahead to Increases Its Elasticity: We recommend soaking the new mowing line in water for at least 24 hours before loading it in your Grass Trimmer. Hydrating the nylon line increases its elasticity. You can keep the mowing line wrapped around the reel and place it directly into the water. EFFICIENT CUTTING:The HIPA ROUND TWIST special design trimmer line has a 50% increase in cutting efficiency than other shapes of weed eater string,due to its obvious sharp edges.Great choice to save great time. RELAX WORK:We produce the most suitable size of trimmer line for all brands machine so that you can easily refill the scroll. The special round twist design and high-quality NYLON materials enable it to cut more weeds in one filling, adapt to various cutting environments such as lawn edges and rock edges as well, and minimize the amount of filling as much as possible to make your work quicker. SAVE FUEL and LOW NOISE:Wear resistant weed eater string 105, not easy to crack weed wacker line, with good high-temperature resistance and toughness,the trimmer string would last for 35% longer time.