Adjustable Aluminum Line Stretchers, 4–12 in.

These Marshalltown adjustable line stretchers keep mason’s line taut between key course blocks for accurate, level brick and block work. Made from durable cast aluminum, they adjust from 4 to 12 inches to fit various block sizes and are sold as a pair.

Key Features:

• Adjustable Range: Expands from 4 in. to 12 in. to fit brick or block courses
• Durable Build: Cast aluminum construction resists wear on job sites
• Secure Hold: Wing-nut slider locks the setting to maintain tight mason’s line
• Pro Results: Keeps line straight and taut for accurate leveling and layout
• Sold as a Pair: Two stretchers included for immediate use

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What sizes of blocks will these fit?
A: They are fully adjustable from 4 inches to 12 inches, accommodating common brick and block sizes.

Q: What material are they made from?
A: Cast aluminum for a balance of strength and light weight.

Q: Are these sold individually or as a set?
A: They are sold in pairs.

Q: What is the primary use?
A: To stretch and hold mason’s line tight between key course blocks for straight, level courses.

Q: Do they require tools to adjust?
A: No tools are needed—use the wing-nut slider to set and lock the length.

Crisp Lines, Masterful Masonry

Precision begins with a perfect line. These aluminum stretchers bring a refined, architectural rigor to your masonry layout, keeping your course true and elegant. I love the sleek cast finish and intuitive wing-nut detail—utility with style. Pair them with a neon mason’s line for a striking, modern contrast that elevates even the most utilitarian build to luxe craftsmanship.

Lock in straight, level courses—add these adjustable line stretchers to your toolkit today.