Line diameters

Before I discuss the actual trimmer lines, I’ll give an overview of what size diameter you’ll need.

Generally speaking there are three size groups of diameters which are:

• Small weeds (between .60 – .80 inches)

• Medium weeds (between .08 – 0.110 inches)

• Large weeds (anything over .115+ inches)

Smaller to medium size weeds you’ll be fine using a line that has the diameter size of .60 – .80 inches. This will be for your smaller jobs around the house, your front lawn and whacking the weeds from your driveway and small residential areas.

Medium size weeds you’d want to opt for a line around 0.80 – 0.110 inches in diameter. This sizing is ideal for your bigger gardens where you have slightly bigger weeds, this size of line commercial areas too.

Dealing with large weeds you’ll want anything from .115+ inches and bigger. Places of work that need a large amount of trimming, such as large estates, huge gardens, and industrial areas of landscaping, this should be your weapon of choice.

Pro tip – Before you go and buy a string trimmer line, check your string trimmer to see what it is capable of holding, as most can only go handle a certain size. Refer to the product handbook if you’re unsure.

Okay, now let’s get onto the actual lines.

Square design

A square design as the name hints is a square line. This type of design makes it perfect to cut down the heavy weeds.

Its’ big, it’s thick (that’s what she said), and it will knock down anything you put in front of it.

It comes in at 0.95 inches in diameter, has been specially designed to prevent the outer layers from welding so easily, and the spool is 685 feet long.

You can knock this line against rocks and trees and it will come out fine.

Best for: Medium to large size jobs for commercial jobs, ideal for landscapers.

Spiral shape

Your spiral shaped string trimmer line is best used in commercial areas, where you have noise limitations.

Spiral shaped lines work best with electric and battery powered string trimmers as they are much quieter than there gas powered brother.

This spiral string used an advanced spiral design to give the user a cleaner cut, and works well on heavier foliage.

I managed to hit the pavement a few times and the even the edges of the road using this string, and it never split or broke off like other spiral lines I’ve used in the past.

Best for: heavy duty jobs, where you have noise restrictions.

Rounded shape

The rounded shaped trimmer lines are for everyday home use, there is not job too small for the rounded line.

This type of line is generally lasts a lot longer if you use it for the smaller stuff, tends to be the cheapest and easiest to line to replace.

Best for: Small residential jobs and personal use around the house.

6-bladed shape

This 6-blade string trimmer line is for the landscaping professional, and made to stick on the end of high-wheel trimmers. The ribbed like design is to increase the ability to cut through weeds and big grassy areas, with no dramas.

If you need something that throws rocks about and has a never say no attitude, this bad boy is for you.

With a 315 foot line, it won’t ever need replacing.

Best for: Heavy duty work and professional landscapers wanting a long lasting line.

Titanium lines

The titanium string trimmer lines the “nex-gen”, if you like of string trimmer lines. A titanium line performs better on all levels.

Faster acceleration, reduces fuel consumption, lowers noise and has level flight characteristics. It can fit all standard trimmers too.

Using this line for medium size jobs was fine, I didn’t incur any problems and even hit my steel fence a few times, with the titanium line coming out undamaged. The thing I love most about this line is that it can provide high quality trimming at low revs.

Best for: Medium size jobs where you require a professional finish, great for landscapers and residential use.

Last words

So there you have it, a brief overview of various types string trimmer lines and what they’re best for. You could go ahead and buy the thickest line you can find and use that for everything, but you don’t take a grenade launcher into a knife fight do you?

It’s important to find the right line for the right job, to get the right finish on the property you’re working on.