Includes SAE graduations in 1/16” increments graduations on one side and metric graduations in 1mm increments on the other. Practical carpentry tools, for rafters, doors window framing, stair layouts and so many more other applications. This construction accessory is useful in making layouts and patterns. The shorter leg measures at 8 inch outside and 6.5 inch inside – longer leg measures at 12 inch outside and 11 inch inside.