These kits, made from solid, finger joint free, kiln-dried wood, each contain two bars, a cross brace, two brace keys, a screw and assembly instructions. The unique design of the stretcher bars allow for frames with maximum strength, stability and warp resistance to be easily built. The wood used to construct the kit is milled with lumber harvested from sustainable forests in Oregon and California. Monet Pro bars have a 1-1/2" deep profile with a 1/2" relief. TWO KITS are required to build a frame. Masterpiece Monet Pro corner keys also available.