Johnson 12 in. L X .625 in. W Aluminum Ruler SAE

Johnson 12 inch architect's rule features a solid aluminum frame and easy reading etched graduations. The tool's 12 inch scale is divided in 3 inch, 1-1/2 inch, 1 inch, 3/4 inch, 3/8 inch, 3/16 inch, 3/32 inch, 1/2 inch, 1/4 inch, 1/8 inch per feet. This is an ideal tool for architects or professionals plans to scale.