Marshalltown Wood Line Blocks are a choice among bricklayers for ensuring that each course of bricks is ly straight and true. Measuring 3-3/4 inches long, these blocks hold their position firmly by friction on the bricks as the line is pulled tight, making your masonry work precise and reliable. Each package contains one pair of these durable wood line blocks, conveniently packed in a bag for easy use on the job site. Designed for efficiency and accuracy, these blocks help you achieve professional results with every project. Model Number: 86