Unique full size back with double contour for maximum comfort. Featuring one front cross-brace; and Two Rear Cross-Braces for added strength and stability. Double Hinge on each side of chair to prevent legs from buckling. Heavy 18 gauge durable steel frame. “V” Shape Plugs on rear legs for added stability. Double Riveted “U” Brace –far stronger than any other welded straight brace.