Jack Richeson's BEST Cross Brace Brackets are the ideal way to attach bracing to any canvas. Screws are included. The slots on the surface of the bracket allow for adjusting the brace tension without disassembling your frame and canvas. Just loosen the slot screws and tighten or loosen the brace as needed. The brackets fit any Jack Richeson BEST cross brace, including heavy duty, medium duty, light duty, aluminium heavy duty, and aluminium gallery wrap. Additionally, you can produce your own bracing for cost savings and attach with these brackets.