Making critical checks and adjustments on woodworking machinery is tough enough without fumbling with your reference tools. Here’s a straight edge that stands on its own while you check it with a feeler gauge or flashlight. Woodpeckers SERX Straight Edge Rules feature an inverted vee-groove profile in one edge. The vee-groove creates a set of legs for the SERX to stand on and clearly reveals any humps or dips in a machine surface. It’s perfect for checking your table saw for flatness, making sure your jointer tables are parallel, setting up your router table and any other machinery alignment job you might face. When you’re not using it for machinery set up, the SERX also serves as a top-quality layout tool. The edge is beveled to bring the graduations right down next to the surface of your work.