• Pocket-sized - this professional miniature scale ruler is 4 inches long. stay equipped for your engineering or architectural projects wherever and whenever you need.
• Durable material - constructed of solid aluminum, this triangular scale is made lightweight and long-lasting, so you can use it for many projects to come!
• Calibration - all engineer scales have the following graduations unless otherwise noted 10, 20, 30, 40, 50, 60 parts to the inch.
• Compact storage - each triangular scale is packaged in a hard, plastic case for convenient storage and easy transport.
• A professional's choice - Alvin has been the professional's choice for drafting tools and drawing supplies for over half a century. since 1950, we have brought quality and value to our customers.

Proudly Made in Poland