STANLEY 45-300 ALUMINUM CARPENTER'S SQUARE 16"" X 24"" HIGH-QUALITY ALUMINUM FOR MAXIMUM DURABILITY. DURABLE EMBOSSED GRADUATIONS AND FIGURES FOR EASY READING. PROVIDES HELPFUL REFERENCE CONVERSION TABLES SUCH AS NEW LUMBER SCALE DECIMAL EQUIVALENT TABLE METRIC CONVERSION TABLE FORMULA FOR SQUARING A FOUNDATION 45 degrees 60 degrees AND 30 degrees ANGLE MARKINGS VOLUME AND AREA FORMULAS WOOD SCREW GAUGE TABLE NAIL SIZES (COMMON AND FINISH) QUANTITY PER POUND AND DEPTH SCALE. PROTECTIVE LACQUERED COATING RESISTS CORROSION.