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Laying It Straight: Line-Holding Accessories for Masons Who Demand Precision

Words: Paul Bender
Photos: MCAA, Prapat Aowsakorn, Iryna Melnyk


When it comes to laying brick, block, or stone, nothing replaces a good line. A tight, true mason’s line is the backbone of straight courses and clean elevations, and the hardware holding that line is every bit as critical. Bon Tool’s lineup of Line & Line Holding Accessories brings together the essentials masons trust: strong nylon lines, rugged stretchers, dependable pins, and smart innovations like the 11-110 Brick and Block Tingle that keep everything on point from the first course to the finish.

As Robert Ham notes in ‘Masonry: Brick and Block Construction’, the mason’s line is “the visual control of the wall”, a guide that keeps every unit true to layout, level, and plumb. When the line is right, every course that follows falls into place. Bon Tool’s system gives today’s craftsman that same precision with modern durability.

The Line: Where It Starts
Bon Tool’s Mason Line range covers every need from quick residential jobs to heavy commercial work. Choosing the right line means balancing tension, stretch, visibility, and durability, core factors Ham emphasizes as the “foundation of accuracy before the first trowel of mortar is spread.”

Twisted Nylon Line – 185' White (Good)
The classic starter. Perfect for short runs or quick setups. It has a bit of give, which some masons prefer for shorter walls or rework-friendly setups. It’s comparable to what you’d find from competitors’ basic mason line, dependable, cost-effective, and job-tested.

Braided Nylon Line – 250' Yellow (Better)
Braided line holds its shape and resists fraying even when dragged across sharp edges. Many masons say a properly tensioned braided line “sings” when it’s tight, a subtle indicator of true tension and alignment, something Ham describes as “the rhythm of the trade.” It’s durable and reliable, especially under the day’s heat or jobsite wear.

Blue Bayou™ Bonded Braided Nylon Line (Best)
When your layout stretches across long lifts or exposed walls, bonded braided line is the top performer. The bonding resists unraveling and minimizes stretch, similar in strength to other premium bonded lines but built to handle repeated tensioning without fuzz or twist. As Ham writes, “Lines must endure as long as the wall rises,” and Bon Tool’s bonded options do exactly that.

Rule of Thumb:

  • Short runs or interior work? Twisted nylon.

  • Longer spans? Go braided.

  • Precision builds and demanding environments? Go bonded braided and don’t look back.



Anchoring The Line: Built To Hold, Not Slip
Every mason has a preferred way to hold their line. Bon Tool gives you the right grip for every situation.

Line Stretchers
Adjustable stretchers keep your line tight and true. These heavy-duty models eliminate sag and allow for quick adjustment mid-run. Ham explains that “a sagging line is a crooked wall waiting to happen,” making reliable stretchers an indispensable part of setup.

Jag Clamps
The award-winning Jag Clamps remain one of the most innovative masonry tools in recent years. They securely grip the line onto walls and corners, no more cracked joints from hammering pins. For solo work or uneven surfaces, these are game-changers and are safer and more efficient than many other alternatives.

Line Blocks
Traditionalists still love the feel of a wooden line block; it’s quick, simple, and proven. For wet or dusty conditions, Bon’s plastic version offers a longer lifespan and better grip on smooth surfaces. Ham often referred to line blocks as “the mason’s third hand,” highlighting their role in consistent coursing.

Line Pins
The old-school workhorse. These steel pins drive into mortar joints or the ground to anchor your line securely. Bon’s polished pins are sturdy, easy to extract, and ideal for setting corner points before tensioning. They’re as familiar to masons as a trusty brick hammer.

Line Twigs, Brick and Block Tingle
Small tools, big value. The “Mason’s Line Twigs” are great for temporary setups or tight areas, while the Brick and Block Tingle (11-110) helps prevent sag across long spans, especially useful on long block walls or large foundations. Ham reminds us that “every inch of line must be in tension,” and Bon’s precision hardware ensures that happens.



Tension, Level, and Reload
Once your line’s up, you’ve still got to keep it level and ready for the next course.

Line Levels
Whether you prefer lightweight plastic or durable aluminum, Bon’s line levels snap easily and give a quick, reliable bubble read. Aluminum tends to hold calibration longer, important for projects that span multiple elevations in a day. Ham noted that “a line that’s straight but not level builds beauty without strength,” reinforcing the value of consistent checks.

Reload Reels
Time is money, and these reels save both. With features like thumb brakes and auto winders, Bon’s reload reels let you spool out hundreds of feet of line without tangles or knots. They’re a favorite among foremen managing multiple walls or crews. Quick resets mean less downtime, and as Ham emphasizes, “organization is the unseen strength of a good mason.”



Why it Matters On The Wall
In masonry, precision isn’t just about looks; it’s about structure, efficiency, and pride.

  • Accuracy: A properly tensioned line minimizes “belly” and ensures uniform courses, reducing grinding or rebuilds.

  • Durability: Bonded or braided lines resist the fray that ruins alignment mid-course.

  • Speed: Fewer resets mean faster progress and smoother teamwork.

  • Professionalism: Clean setups with quality gear show clients that craftsmanship still matters.
Ham often wrote that “the line doesn’t lie.” Every block laid to it carries the mason’s reputation. Bon Tool’s lineup honors that truth, offering tools that keep every course straight, every corner tight, and every wall a reflection of skilled labor.



Straight Lines, Tight Joints, and Pride In Every Course
From twisted nylon line to bonded braided, and from line pins to Jag Clamps, Bon Tool covers every detail of line layout. The lineup is made for pros who take the phrase “laying to the line” seriously. The right setup not only saves time but also builds trust, because when your wall runs true, everyone notices.

Explore Bon Tool’s full lineup of Line and Line Holding Accessories, knowing that any of the products are available for private label at www.bontool.com/line-line-holding-accessories and you can also see why more masons are saying their best work starts with Bon.


About: Technical Talks
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