10 Best String Trimmer Lines 2025 in the United States

The Black+Decker Trimmer Line Replacement Spool (AF-100-2) is designed to fit a wide range of Black+Decker string trimmers, making it highly versatile. With a line diameter of 0.065 inches, it is suitable for light-duty trimming tasks.

The round line shape and factory wound 30-foot length ensure consistent feeding with minimal manual effort, thanks to the Auto Feed System. The use of centrifugal force helps achieve maximum performance, reducing the need to stop and adjust the line frequently.

This trimmer line is best for those who own compatible Black+Decker string trimmers and are looking for a hassle-free replacement option. Its lightweight design at 3.04 ounces also makes handling and installation straightforward. Despite the frequent replacement for large properties, its ease of use and compatibility make it a convenient choice for many users.

The DEWALT Trimmer Line measures 225 feet in length and has a diameter of 0.080 inches. This line is designed to be aerodynamic, maximizing the runtime of your trimmer. Made from flexible and impact-resistant materials, it is built to last and withstand tough trimming conditions.

Installing the line is straightforward—you simply wrap it around the spool. This trimmer line is compatible with both single and dual line DEWALT weed eaters and wackers, making it versatile for users of DEWALT products. It's made in the USA with globally sourced materials, ensuring a blend of quality and durability.

The trimmer line might not be the best choice for non-DEWALT trimmers, limiting its versatility across different brands. Additionally, while its aerodynamic design enhances performance, some users may find the 0.080-inch diameter less effective on thicker, tougher weeds compared to thicker lines.

This replacement string trimmer line is designed to work with a variety of Ryobi cordless trimmers, including 18V, 24V, and 40V models, making it a convenient choice if you own one of these Ryobi tools. The line diameter is 0.08 inches, which is a good middle ground—thin enough to handle light to medium weed trimming efficiently without putting too much strain on the trimmer. Made from durable copolymer nylon, the line offers flexibility and strength, so it should hold up well while cutting. The package includes 10 spools, each with 11 feet of line, giving you plenty of material to cover a lot of trimming without frequent replacements. It also comes with 2 trimmer caps and a storage box, which adds to the ease of use and organization.

The aerodynamic line shape helps reduce drag, meaning your trimmer won’t work harder than necessary, allowing for smoother cutting. One important feature is its compatibility with an auto-feed system, so you won’t spend time manually winding the string. However, because the line diameter is on the thinner side, it might not be the best fit for very thick or tough brush. This product offers great value with its included extras and convenient features, making it a reliable and flexible replacement line for your Ryobi cordless trimmer.