Swanson Big 12 Speed 12 In. Aluminum Rafter Square replacement Featuring serrated edges for reliable

Featuring serrated edges for reliable grip

In the case of a power outage

Not to be used for oxy-acetylene welding

x #6 panhead screws

000 possible combinations

Swanson Big 12 Speed 12 In. Aluminum Rafter Square replacement Featuring serrated edges for reliableCast 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.