Profiles and structural shapes are shaped stock forms with uniform cross-sections. Examples include tees, angles or beams manufactured through extrusion, continuous casting, roll forming, and other manufacturing processes. Profiles and structural shapes are used in a variety of engineering and construction applications. Many types of structural steel shapes and aluminum structural shapes are available. Accuracy is an important consideration in that a structural steel shape or aluminum structural shape often needs to fit precise dimensions or support heavy loads. Typically, profiles and structural steel shapes are formed securely to satisfy various strength requirements. As a rule, the die design for an aluminum structural shape determines the precise cross-sectional dimensions of the shape or profile.