Composites consist of two or more materials of different properties. The different materials remain separate but are bound together to give the composite unique mechanical properties. The greatest advantage of composite materials is strength and stiffness combined with lightness. Composites are widely used in airplanes. Wings, tail sections, internal structures, propellers and rotor blades are constructed from composite materials. Composite test specimens are commonly tested in tension, compression, and shear loading. ADMET offers electromechanical, servo hydraulic and fatigue testing systems with composite test fixtures conforming to industry standards.