You may need to install this 71-inch cross brace if you have a large canvas that has the potential to bow over time, as the longer the length of lumber is, the more likely that it will bow. Adding this to your frame will improve its stability and ensure that it will look great throughout its display life. You will need to install this using the bracket set which is included with the cross brace, and it is intended for use with stretcher bars. The cross brace is an effective tool for protecting your art work, and this heavy duty cross brace is intended to be more durable than other cross braces. Can be attached to another cross brace with the pre-notched center, and ships quickly.