Engineering Chain Plastic Triangular Scale

Made for Engineers - with sharp and easy-to-read machine-engraved white graduations and color-coded furrows that resist wear, this triangular scale is made ideal for engineers and mechanical draftsman graduations. Durable material - this professional-quality scale is made from high-impact plastic with black, non-reflecting, matte faces and tapered edges so it's lightweight and long-lasting. 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