DIY Natural Wood Frame Stretcher BarsFollow The Instructions Below Step 1: Take inventory. Each Paint With Diamonds Wooden Frame Stretcher Bar kit comes with: 4x Wooden Stretcher Bars 4x "U" Nails 4x Corner Wedges Step 2: Lay your canvas out face down on a smooth, clean, flat surface. Lay out each Stretcher Bar along the edges of the canvas. Make sure each stretcher bar is flush up against the edge of the painting! Otherwise your final product might not come together well. Also take note