Bon Tool 11-287 Plastic Masonry Line Blocks Pair

Product Description

The BON TOOL 11-287 is a pair of plastic masonry line blocks designed for precise course alignment during brick and block installation. Each block measures 3.5 inches long by 1.25 inches wide and is molded from a split-resistant plastic blend that grips wall surfaces firmly without damaging the face of the masonry unit. The clamping action holds layout string at a consistent tension and position across the course, keeping lines true without nails, clips, or adhesives. Bricklayers and masons reach for these blocks when accurate horizontal control is required from lead to lead on residential and commercial masonry projects.

These line blocks are suited for standard brick, concrete masonry unit (CMU), and block wall construction wherever a taut guideline is needed to maintain uniform course height and plumb alignment. The pair configuration provides one block per end of the wall section, enabling a balanced, stable string line setup across the full run of a course. Their lightweight plastic construction keeps tool-bag weight low across a full workday on the job.

Key Features

• Split-resistant plastic blend construction for extended jobsite durability
• Clings firmly to wall surfaces to hold line position under tension without slipping
• 3.5-inch length and 1.25-inch width provide stable footing on standard masonry units
• No nails, clips, or adhesives required for setup or removal
• Sold in pairs for balanced two-end string line configuration
• Lightweight at 0.12 pounds per pair, easy to carry on the job

Compatibility

Designed as a standard-format masonry line block suitable for use with most brick, block, and CMU wall construction applications requiring a tensioned layout string.

Installation Notes

Line blocks are installed by masons and bricklayers without power tools. Hook one block over each lead corner or end unit of the course, then stretch the layout string between them at the desired height. Confirm the string is taut and level before laying units to that course. Remove blocks carefully at the end of each course to avoid disturbing set mortar joints.