This Kreg PRS3400 set of 7 sturdy metal rulers with markings is designed for precise setting and adjustment of the milling table. Thanks to the special three-sided design, it is possible to precisely set the milling depth, the height of the cutter protrusion and other important parameters. One of the edges of each ruler has a concave profile, allowing you to easily determine how much the router blade protrudes above the table. This is helpful when you need to make precise cuts or selections. With these simple but functional rulers, you can quickly and efficiently adjust all elements of the router table. This will greatly improve the accuracy and quality of your work while saving you time and effort.