Empire, 36", Aluminum, Straight Edge, Designed To Measure Surfaces Up To 3', Scale Graduations Are Easy To Read For Improved Accuracy, Aluminum Construction Helps Ensure Strength & Long Lasting Use, Aluminum Construction Also Helps Prevent Warping, Wide Frame Improves Impact Resistance & Durability, Can Also Be Used As A Straight Edge For Tracing & Drawing Straight Lines, Can Hang On Hooks For Easy Storage.