Best Masonry String Lines of 2026

Harry Stack Avatar
Harry Stack
Last Updated: Jan 18, 2026

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Masonry string lines are essential tools for builders and DIY enthusiasts who want to lay bricks or blocks in straight lines. These lines are made of durable materials such as nylon, polyester, or braided cotton, and come in various lengths and thicknesses. They are typically used to create a straight line between two points, allowing the mason to ensure that the bricks or blocks are laid evenly and in the correct position. Masonry string lines are easy to use and can be set up quickly, making them a must-have tool for any construction project.

At a Glance: Our Top Picks

ACE Supply Nylon Braided Masonry String #18 - 250 Ft Cover #TOP 1
ACE Supply Nylon Braided Masonry String #18 - 250 Ft
ftb score rating icon 9.9
Romeda #18 500 Ft Mason Line Cover #TOP 2
Romeda #18 500 Ft Mason Line
ftb score rating icon 9.8
GOLDEN COCK Mason Line String 1.3mm Cover #TOP 3
GOLDEN COCK Mason Line String 1.3mm
ftb score rating icon 9.6

Top 10 Masonry String Lines

#TOP 1

ACE Supply Nylon Braided Masonry String #18 - 250 Ft

MLR-WH-250-6-BRNYL18
White
250 Ft Roll
ACE Supply Nylon Braided Masonry String #18 - 250 Ft Cover
Bright White Twine String - #18 Strong Nylon String - 250 Ft Length - White String for Gardening, Nylon Twine for Plants

The ACE Supply Nylon Masonry String offers a durable and reliable option for various outdoor tasks. Made from high-quality nylon, this string provides extra strength, making it tougher than typical polypropylene twine and ideal for heavy-duty projects. Its braided design prevents fraying and unraveling, so your knots stay secure without the hassle of loose ends. You can easily use this string with a line level or plumb bob for precise measurements, making it perfect for construction or gardening. Additionally, it works great in your garden to support plants like tomatoes or for general landscaping needs, giving you a versatile and easy-to-handle tool.

What We Like
Strong and durable
High visibility color
Consistent thickness
Easy to knot and cut
Good value
What We Don't Like
Difficult to find string end
Cancer warning label
#TOP 2

Romeda #18 500 Ft Mason Line

14CSNLX0001
Orange
Romeda #18 500 Ft Mason Line Cover
Romeda Mason Line #18, 500 Ft Orange String, Construction Twine for Gardening & Masonry

The Romeda Mason Line is a versatile tool for all your marking and gardening needs. Made from high-quality nylon, this durable #18 string is perfect for a wide range of applications, including DIY projects and masonry work. Its robust braided design ensures it can withstand harsh conditions, whether in direct sunlight or submerged in water. You'll appreciate its strong resistance to moisture, UV rays, and chemicals, making it reliable for long-term use. Plus, with 500 feet of bright orange line, you'll have plenty to work with while easily spotting it in any setting.

What We Like
Strong and durable
Bright orange color
Good price
Easy to use
Braided, not twisted
What We Don't Like
Cardboard spool unravels easily
Spool lacks end supports
#TOP 3

GOLDEN COCK Mason Line String 1.3mm

TDT4929
Orange
262 Ft
GOLDEN COCK Mason Line String 1.3mm Cover
Mason Line String 1.3mm Thick Twisted Polypropylene – Durable Construction Twine for Laying Bricks, Blocks, Fences in Gardening, DIY & Landscaping Projects (Orange, 262 Ft)

The GOLDEN COCK Mason String is a versatile tool designed to help you achieve precise and straight lines for your construction projects. With a 1.3mm thickness and a length of up to 393 feet, it’s perfect for laying bricks, blocks, and marking boundaries. Whether you’re working on masonry or gardening, this durable string makes it easy to set clear planting rows or fence lines. It’s also great for DIY projects, helping you maintain accuracy on home improvements and crafts. The string’s high visibility and sturdy construction ensure it stands up to outdoor conditions, making your work easier and more efficient.

What We Like
Bright colors
Durable construction
Multiple uses
Strong support
Smooth reel operation
What We Don't Like
Plastic reel
#TOP 4

STRINGLINER 25406 Reloadable Line Reel

25406
Orange
No Size
STRINGLINER 25406 Reloadable Line Reel Cover
STRINGLINER Company 25406 Twisted 540-Feet Reloadable Line Reel, Fluorescent Orange

STRINGLINER 25406 is a durable and convenient reloadable line reel made of polyethylene. The line secures in a convenient notch and the reel is suitable for all construction purposes. This masonry string line reel is easy to use and ideal for a wide range of construction applications.

What We Like
High visibility color
Durable, strong string
Easy to use
Good for property marking
Convenient handle design
What We Don't Like
Reel design could be better
Shipping slightly delayed
#TOP 5

Kraft Tool BC352 Premium Professional Masons Line

BC352
White
Kraft Tool BC352 Premium Professional Masons Line Cover
Kraft Tool BC352 Premium Professional Bonded Braided Masons Line with 500-Feet Tube, White/Black, One Size

This masons line is made in the United States and comes in the model number BC352. The package dimensions are 9.0" L x 6.0" W x 0.375" H, and it weighs 1.0 lb. This braided line is perfect for masonry projects.

What We Like
Strong and durable
Easy to untie knots
No stretch
Great value
Works well on block
What We Don't Like
Somewhat stretchy
Packing could be improved
#TOP 6

MARSHALLTOWN Bonded Mason's Line ML613

Marshalltown - ML613
Yellow & Black
500 Foot
MARSHALLTOWN Bonded Mason's Line ML613 Cover
MARSHALLTOWN Masonry Line, Bonded Nylon, Yellow & Black, 500 Foot, #18 Line Size, Masons and Archaeology. Made in The USA, ML613

The MARSHALLTOWN Mason's Line is a robust tool designed for your masonry and archaeology tasks. Its durable bonded construction stands up to damp conditions, ensuring reliability over time. You’ll appreciate its braided design, which enhances strength and stability, making it less prone to wear from moisture or dryness. Additionally, this line comes in various styles, colors, and sizes, allowing you to choose the perfect fit for your project needs. With the added benefit of being made in the USA from global materials, you can trust its exceptional craftsmanship for your work.

What We Like
Strong bonding
High tensile strength
Easy depth visibility
Plastic center, resists water
Minimal fraying
What We Don't Like
Slightly more stretch than premium brands
#TOP 7

ARISKEY #18 Orange Mason Line 1000ft

MSX-CS-1000ft
Orange
ARISKEY #18 Orange Mason Line 1000ft Cover
ARISKEY Mason Line String, #18 Orange Thread,1000 Feet Durable Construction Masonry Line for Outdoor,Gardening,Tomato Twine,Strong Nylon String

The ARISKEY Orange Mason Line is a bright, easy-to-see string that helps you stay precise when working outdoors. Its vivid orange color stands out clearly against soil and building materials, which makes alignment tasks simpler and more accurate. Made from tough nylon, this string won’t easily stretch or wear out, so you can rely on it for heavy-duty projects. It’s also treated to resist moisture and UV damage, ensuring it stays strong and vibrant through all weather conditions. Whether you’re gardening or handling construction tasks, this string offers dependable support and clear visibility to get your job done right.

What We Like
Very strong and durable
High visibility orange color
Excellent value for 1000 feet
Holds knots securely
UV and weather resistant
What We Don't Like
Material labeling unclear
Frays when cut
#TOP 8

Goldblatt 4 Pieces Concrete Tools Set

Orange,yellow
Goldblatt 4 Pieces Concrete Tools Set Cover
Goldblatt 4 Pieces Mason Line Clamps & Mason Line String Line - Red & Orange Nylon Twine String Rolls, Concrete Tools Set, Construction Masonry Measurement String for A String Level

This Goldblatt Concrete Tools Set includes two Mason Line Clamps and two Masonry Line Rolls in red and orange colors. The Mason Line Clamps are designed with a secure gripping power that can hold long courses, fit on brick, block, fencing, and woodworking jobs. The Mason Line is made of sturdy and durable nylon material with a tensile force exceeding 130 lbs and built-in elasticity that maintains tension and eliminates sagging. Its bright warm color is user-friendly in construction space. This 4 piece set serves multiple purposes, such as crafting, home improvement, landscaping, and construction. With this set, you can save time and money since it includes all the tools you need.

What We Like
Strong spring clamp
Great value package
Works for different block sizes
Included masonry string
Prevents line slipping
What We Don't Like
String line not always needed
#TOP 9

BSRHOME Nylon Masonry String Line 600 Ft

MSLR-YE01
Fluorescent Yellow
600FT
BSRHOME Nylon Masonry String Line 600 Ft Cover
BSRHOME Reloadable Line Reel,Mason Line String Line,600 Ft Length Nylon Twine,Nylon String for Gardening Or Masonry Tools,Twine String for Gardening,Yellow

The BSRHOME Nylon String Line is made from strong virgin nylon yarn, which is more durable and flexible than regular polypropylene thread. This means you get a reliable string that lasts longer and stands up well to moisture, oil, and harsh weather. With a generous 600-foot length, you have plenty of string for all your gardening or construction needs, and its bright fluorescent color makes it easy to see in any setting. Plus, the waterproof and UV-resistant coating protects the string from damage by sun and rain, so it stays tough and doesn’t fray or weaken over time. This makes it a practical and convenient tool for outdoor projects.

What We Like
Strong and lightweight string
High visibility neon color
Good price point
Easy to use reel
Durable build quality
What We Don't Like
Line unravels after cutting
Reel design could be improved
#TOP 10

LURKA Mason Line String #18 540ft

MHBCXQ666
Fluorescent Orange
LURKA Mason Line String #18 540ft Cover
LURKA Mason Line String,#18 540 Feet Braided Construction Nylon Line with 5 Built-in Levels and Spool Fluorescent String Line for Precision Work, DIY, and Gardening (Fluorescent Orange)

The LURKA Mason String Line is a sturdy, high-strength nylon line designed for various projects. Its premium braided construction offers impressive durability, so you won’t worry about knots or twists while working. With five built-in levels, you can quickly check if your bricks or blocks are perfectly aligned, making your construction tasks more precise and efficient. This line is also versatile—you can use it for gardening, picture hanging, or bundling items. Plus, the convenient handle makes it easy to hold and rewind the spool, helping you stay organized and work smoothly on any project.

What We Like
Durable, strong string
Highly visible color
Includes string levels
Convenient spool design
Accurate for leveling
What We Don't Like
Levels can be finicky
Spool notch could be better
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What is the use of masonry string?

Masonry string is used in construction to establish straight lines and uniform levels. It serves as an accurate reference guide for building walls. By connecting fixed points and using nails or wooden pegs, the string helps measure distances and ensures precise alignment during construction.

2. Why do builders use string lines?

Builders use string lines, also known as line levels, to achieve level ground over longer distances. These levels can be attached to tightly pulled strings and used to find level between two stakes in the ground. String lines help builders ensure a consistent and level surface for various construction projects.

3. What is the purpose of the yellow masonry string?

The yellow masonry string, also known as mason twine, is used to quickly and accurately level masonry work. It has good abrasion resistance, is rot-proof, and resists oil, gasoline, and most chemicals. Masons, contractors, carpenters, and homeowners use this twine to ensure precise leveling during construction.

4. What is the purpose of a mason's string line and level?

A mason's string line and level serve the purpose of creating straight lines and leveled surfaces. They are particularly useful when laying patios, posts, footings, and other construction projects. This twine eliminates the need to constantly pick up a level, and it does not sag like other types of twine, ensuring accurate and consistent leveling.

Editor's Notes

During our masonry string line research, we found 24 masonry string line products and shortlisted 10 quality products. We collected and analyzed 28,914 customer reviews through our big data system to write the masonry string lines list. We found that most customers choose masonry string lines with an average price of $11.72.

The masonry string lines are available for purchase. We have researched hundreds of brands and picked the top brands of masonry string lines, including ACE Supply, Romeda, GOLDEN COCK, Stringliner, Kraft Tool. The seller of top 1 product has received honest feedback from 185 consumers with an average rating of 4.9.

Written by
Harry Stack Avatar

Harry Stack owns a small hardware store, his career landed him a depth of knowledge in categories such as tools, equipment, machinery and hardware. In his spare time, he usually repairs furniture, safes and appliances, and he knows how to make simple repairs to plumbing or electrical fixtures. His hobbies also include woodworking and fishing.

Masonry String Lines Comparison Table

#TOP1
#TOP2
#TOP3
#TOP4
#TOP5
#TOP6
#TOP7
#TOP8
#TOP9
#TOP10
Brand ACE Supply Romeda GOLDEN COCK Stringliner Kraft Tool MARSHALLTOWN ARISKEY Goldblatt BSRHOME LURKA
Material Nylon Nylon Polypropylene Polyethylene Blend Nylon - Nylon Nylon Nylon
Color White Orange Orange Orange White Yellow & Black Orange - Fluorescent Yellow Fluorescent Orange
Style White Braided Handle Twisted Classic Yellow & Black Nylon - Braided Fluorescent Yellow Braided
Line Weight 170 Lb Max Tensile Strength 150 2000 - 1 pound 150 or 200 - - 600 168 pounds
Item Weight - 7 ounces 4.6 ounces - 2.4 ounces - 3.2 ounces 225 Grams 8.9 ounces 12.7 ounces
Item Length - 500 Feet 394 Feet - 500 Feet - - - 600 Feet 540 Feet
Unit Count - 500.0 Feet 1.0 Feet - 500.0 Feet - - - 600.0 Feet 540.0 Feet
FTB Score
ftb score rating icon 9.9
ftb score rating icon 9.8
ftb score rating icon 9.6
ftb score rating icon 9.6
ftb score rating icon 9.5
ftb score rating icon 9.5
ftb score rating icon 9.3
ftb score rating icon 9.2
ftb score rating icon 9.2
ftb score rating icon 9.0
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