Masterpiece Vincent Pro Stretcher Bars with Brace are top quality stretcher bars for building your own stretched canvas. Vincent Pro Stretcher Bars come with a cross brace which properly supports frames from bowing while maximizing tension; producing flat and tight stretched canvas. The kits include 2 7/8- deep stretcher bars that produce a 5/16- relief between the bar and canvas, one cross brace, 2 brace keys and 2 screws. The bars are solid wood with no finger-joints; making them stronger and resistant to breaking under tension and over time. All the wood comes from the sustainable forest of Oregon and California.