Product Description
Cast aluminum alloy. Measures 12″ x 12″ and 17″ across the diagonal, which is marked off in degrees from 0 deg. (degree) to 90 deg.. Features scribe bar, notched every 1/4″, to lay out parallel lines. Lay-put bar adjusted out to fit out of square corner. 2 adjustable stop pins can be set for proper run and proper rise. Includes Blue Book of Rafter Length and Roof Construction.
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