This 70-inch cross brace is intended for large canvases and can be attached to stretcher bars to add more stability to the canvas. Cross braces are essential for larger works to protect them from bowing and breaking over time. This cross brace is very high in quality and durable, and because it is heavy duty it is more resistant to wear and damage over time. It can also withstand a large amount of tension. The cross brace is attached to the frame with the bracket set that is included in the shipment, and it is pre-notched for your convenience to quickly add a second cross brace.