1.The main body is made of brass and aluminum alloy through CNC manufacturing, and then the aluminum alloy is anodized to ensure the high quality and durability of the product. 2. The new Dovetail Marking Jig Wheel Marking has a special small window, which can be more convenient for woodworkers to observe the accuracy of the scale when working. 3.The 8" length precision grinding bar with laser printed scales is available in both metric and imperial units with an accuracy of 1/32" and 1mm per grid. 4.Precision is key in woodworking - use our marking knife woodworking tool and wheel marking gauge for accuracy every time. 5.Simple and easy to use, can provide very useful help for beginners.