
Cast aluminum alloyMeasures 12" x 12" and 17" across the diagonal, which is marked off in degrees from 0 deg(degree) to 90 degFeatures scribe bar, notched every 1/4", to lay...
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