? 3 RULERS IN 1 DELUXE BUNDLE - Be ready for any professional or recreational drafting task as this bundle includes 1 architect scale ruler, 1 engineer scale ruler, and a standard metal ruler. ? EXCELLENT READABILITY - With laser-etched white markings set on a black background, these rulers are easier to read than rulers with poor contrast or printed markings that easily fade or rub off. ? READY FOR MANY YEARS OF USE - Subpar scale rulers have a steel exterior but are filled with plastic. Our scale rulers are made of solid aluminum that will easily withstand impact or drops.