The K3 Custom Frame Kit comes complete with 3.5 inch deep Stretcher Bars, Corner Keys, Brace Keys, and a detailed set of instructions. Custom Frame Kits were never this easy until now! The kit is easily assembled into very strong frame ready to accept the canvas of your choice. Canvas is not included. The Professional K2 3.5 inch deep Stretcher Bar are milled from solid fir, not finger-jointed wood which tends to break under pressure. The patented double-key Stretcher Bar system makes the frame rock solid. The K3 frame won't twist. Add beauty and intrigue to your art by painting on a deep canvas.