Our "Fire & Birch" series is a single layer engraving on a painted birch plank that is over a half inch thick. You can feel the engraved islands and depth contour lines, and of course our superior details. Unlike other companies, we use the best grade in engineered solid birch wood to minimize warping and produce an art piece that will last a lifetime. Keyhole slots are router into the back so our pieces are ready to hang flat on your wall.