Swanson Big 12 Speed 12 In. Aluminum Rafter Square Larson 1/2" drive 6-point sockets -

1/2" drive 6-point sockets - 1/2"

Galvanized finish for ideal outdoor use

Made from proprietary steel and heat treated to control hardness

high strength repair material

Use any time of year to save money by saving energy

Swanson Big 12 Speed 12 In. Aluminum Rafter Square Larson 1/2" drive 6-point sockets -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.