Bon Tool 4″ Line Block
Professional-grade masonry line block designed for holding mason’s line taut and secure across a course of brick or block. These blocks are crafted from select hardwood to ensure durability and a steady grip on corner units. The standard 4″ size provides a large surface area for stable positioning, allowing masons to maintain a perfectly level and straight line during high-production wall construction.
Key Features
- Select Hardwood: High-quality wood construction for jobsite longevity.
- Standard 4″ Size: Optimized for standard brick and block dimensions to provide maximum stability.
- Smooth Finish: Designed to prevent line snagging and ensure easy adjustment.
Technical Specifications
- SKU: 50-503
- Material: Select Hardwood
- Size: 4″ Standard
USA Scaffolding supplies professional-grade masonry tools and equipment. Ultimately, contractors nationwide trust our brand for jobsite-tested quality and safety.




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