Staedtler Scale Ruler is perfect if you're doing technical drawings or other work where you need to measure and create using ratios

• An inexpensive quality scale ruler
• Durable plastic construction with long-lasting graduations
• Ideal for students
• Tough, flexible, climatically stable and will not discolour or become brittle with age
• It provides a 1:1 and 1:2 ratio on the front and a 1:5 and 1:10 ratio on the back
• Ideal for students