This 3 in 1 set marking gauge provides a variety of helpful woodworking applications for users of all kinds. Unlock the center knob to freely slide the gauge back and forth. This allows you to manually take caliper-grade measurements with . 0.05mm precision. Vernier scale includes both metric and imperial markings, depending on the needs of the task at hand. This allows users to mark out workpiece reference lines, align tool fences, and set exact cutting depths on their router tables or table saws. Sturdy steel construction provides a durable long-lasting straight edge while the laser-etched markings maximize precision and prevent fading. With an Offset Gauge, the possibilities are endless. Remember when you had a tool that did it all? Remember XuRi.