These are available in a package of two clamps that are a fully adjustable version of the popular JAG Clamp that most people are familiar with. , They
JAG Masonry Line Clamps: XL
Braided Nylon Mason Line #18
Masonry String Lines - Masonry String Lines / Masonry
Kraft Tool BC352 Bonded Braided Masonry Line, 500-Feet (White/Black)
Durable and reliable Twisted Mason's Line designed for masonry and archaeology projects Resistant to damp conditions for long-lasting performance
MARSHALLTOWN Masonry Line, Twisted Nylon, Fluorescent Pink, 250 Foot, #18 Line Size, Masons and Archaeology, ML569
Brick Line Clips Line Runners Brick Leveling Line Runner - Temu
Nylon Twine 210d/24ply 36ply Fishing Net Twine 3 Strand PP String
3D Printable Line block (Mason line) by Simon Holmes
MARSHALLTOWN 3-3/4 in. Wood Line Blocks (Pair) 86 - The Home Depot
Kraft Tool Co- Mason's Line
