- High tempered aluminum for maximum durability
- Useful tables and information stamped into square, such as: new lumber scale, decimal equivalent table, metric conversion table, formula for squaring a foundation, 45°, 60°, 30° angle markings, volume and area formulas, wood screw gauge table, nail sizes (common and finish), quantity per pound and depth scale
- Deep, long-wearing graduations for easy reading
- Protective lacquered coating resists corrosion
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