Works as intended but the design doesn't take into account that most lumber, scrap wood or whatever is not of its nominal size. this. Board is 1 inch thick, not 1 inch. I have used this to guide the ends of finished rocker panels that come with straight ends. Instead of cutting at an angle and adding a piece to the ends, routing the ends uses less wood and is less of a hassle. I can adjust the depth to fit the concave part of the drawing and most of the bullnose. I then sanded the edge toβ¦