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Johnson's heavy-duty aluminum square is designed for professionals in drywall installation and finishing. With a length of 48 inches and a blade width of 1.5 inches, this tool is ideal for accurate measurements and cutting. The clear protective anodized finish ensures durability and longevity while the bold graduations provide easy reading for precise measurement. The unique rivet assembly also enhances accuracy and reduces wobbling when used with Johnson's 48-inch or 54-inch heavy-duty drywall T-squares. This aluminum square is perfect for both residential and commercial applications, ensuring quality workmanship every time.