The Kapro 314 Set & Match Ruler allows you to build your perfect DIY tool with mix and match accessories. This ruler is crafted with an aluminum straight edge and printed markings for accuracy and longevity. It features a zero-center scale, which is perfect for measuring from the center point of your project, and an anti-slip feature to ensure the ruler stays in place while you work. The ruler also includes two cylindrical sliding vials for both horizontal and vertical measurements. It comes equipped with practical accessories providing the flexibility to use it in many projects. The sliding knife guide and sliding markers allow for safe and accurate marking and cutting. The ruler also features electrical and plumbing scales, a nail gripper, and a drill bit diameter gauge, making it a dependable ruler filled with extra features.