Trimmers Choose the Best Trimmer Line

Published on February 20th, 2015 | by Turner Anderson


Choosing the Best Trimmer Line for You

Did you know that the shape and diameter of your trimmer line can determine how quickly and efficiently your weeds are cut?

Trimmer lines come in different shapes and diameter sizes to be used for heavier or lighter jobs. The size of your yard and thickness of your grass should be determined before choosing your line shape or diameter. Different styles of lines can assist you in cutting your job time in half and creating a cleaner, more even cut.

Always refer to your owner’s manual before shopping for trimmer line to determine which line shape and diameter best suits your trimmer.

Trimmer Line Styles

Round Trimmer Line

Round trimmer line

Do you use your trimmer to trim grass edges or get rid of weeds around a residential yard? Does your yard contain a minimum amount of weeds that don’t require a lot of time to cut?

Round Trimmer line is the standard, basic shape that won’t wear down as quickly as other trimmer lines. These trimmer lines are used for lighter, residential use with minimum weeds. Round trimmer line breaks less and is more durable against concrete, trees and etc. to give you an extended use time. This is also the easiest trimmer line to replace in your trimmer. Some include: Force, Magnum Gator Line, Pivotrim, Red Gatorline, Super Blue, The Core, The Fire, Trim Line, and much more.

Multi-sided Trimmer Line

Multi-sided trimmer line.

Do you have a larger yard, thicker weeds, or do you use your trimmer for commercial use? Multi-sided trimmer lines are best used for medium sized jobs with heavier weeds or larger lawns.

Multi-sided trimmer lines have multiple sides that produce a cleaner cut. These lines commonly come in the shape of a star, square or pentagon. These trimmer lines slice through heavy weeds and thick grass quickly and efficiently, giving you an even cut in less time. However, multi-sided trimmer lines break easy when they come in contact with stones, fences, curbs, sidewalks and etc. Some common multi-sided trimmer lines are: Gatorline, Magnum Gator Line, Nylium Starline, The Edge, Trim Force, and much more.

Serrated Trimmer line

Serrated trimmer line

Do you have a lot of weeds on your property? Or do you use your trimmer for a lot of commercial use? Serrated trimmer lines are used for heavier jobs with thicker weeds and more area to cover.

With edges that act like teeth or a kitchen knife, this serrated line can quickly saw through grass blades and thick leaves, leaving a cleaner trim. This trimmer line has extra cutting power and can be used for medium-heavy jobs. A serrated trimmer line can cut through weeds easily and quickly to keep your trimming time at a minimum. Flexiblade is a commonly used serrated trimmer line.

Twisted Trimmer Line

Twisted Trimmer line

Do you have a lot of heavy, thick weeds? Do you use your trimmer for rugged commercial use? A twisted trimmer line is used for heavy-duty use and on yards with a lot of heavy, thick weeds.

Twisted Trimmer line adds strength, improved efficiency and reduces noise levels. This line is a step up from the round style line and offers durability when hitting concrete or hard surfaces. This trimmer line can reduce trimmer vibrations and noise levels while giving you a clean, even cut. Some commonly used twisted trimmer lines are: Platinum Gatorline, Super Twist Magnum Gatorline, and much more.

Line Diameter

Trimmer line comes in many different line weights and diameters. A larger diameter will increase your cutting power and durability against thicker grasses and weeds. A lighter weight should be used on areas where there are a minimum of weeds. However, each trimmer can only handle a certain line diameter, check your owner’s manual for model specific recommendations.

Light Work: Residential front and back lawns with lighter weeds.

Medium Work: Larger back and front lawns or lawns with heavier weeds and light commercial work.

Heavy work: Industrial landscaping, large yards, golf courses and other areas that need a large amount of trimming.

Diameter Size:

Light-medium work: 0.065 inches – 0.080 inches

Medium-heavy work: 0.085 inches – 0.105 inches

Very heavy work: 0.110+ inches


When choosing trimmer line determine the thickness of your weeds and the line recommendations in your owner’s manual. With the right trimmer line choice you’ll get a clean, even cut in half the time.

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About the Author

is the Internet Marketing Manager at Jack's and the editor of Jack's DIY Center. You'll also find him creating How-To articles, videos, newsletters, and much more.

4 Responses to Choosing the Best Trimmer Line for You

  1. Daniel says:

    In your opinion, what is the best trimmer line for a battery string trimmer?

  2. Pizza Dreme says:

    The graphics clearly illustrate each trimmer line type, and the descriptions helped me understand performance differences.

    I have been using multi-sided trimmer line in a yard which has many trees, bushes and hard spots, so I have been experiencing frequent trimmer line breakage. But while my trimmer is chopping through thick weeds–no matter how carefully–I keep breaking off lengths of multi-sided trimmer line. So next time I am going to determine whether or not twisted trimmer line is cost effective.

  3. Isaac White says:

    I have yard machine push weed eater and I can’t find large enouph string ,I’m using .155 but it don’t last but a few minutes for what I’m cutting with the heavy weeds I got ,where can I find larger.

  4. Joe.D says:

    I often choose Round Trimmer Line for my string trimmer. Because it’s durable.

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