SQUARE RAFTER 12IN HD ALUMINUM. Features and Functions: Stamped conversion tables. Mark and cut boards up to 12-inches wide. Thick frame design ensures safe use as a saw guide. Graduated notched area for pulling layout lines. Made in USA. Description: Solid, one-piece aluminum extrusion outperforms brittle die casts. Will not rust, bend or break. Stamped conversion tables. Thick edge makes for a safer saw guide.