Features: The marking gauge is crafted from aluminum alloy material, with anodized surfaces treatments for long-lasting durability and corrosion resistance. With precise scale on the ruler body, it is widely used for woodworking marking and measuring marks such as marking the center line on circular surfaces, square surfaces, right angles, and finding the center point on circular surfaces. Design simple and practical. The ruler body is thickened and can be used for multiple purposes. It can mark lines and measure 45 and 90 degree angles. It is simple to operate and has common functions for woodworking such as length measurement, 45/90 degree angle measurement, correction, marking the center of a circle and the center line of a circle. Suitable for DIYers, engineers, carpenters, and decorators. It is essential measuring tool for workers in the wood industry. It is suitable for round materials, three-dimensional workpieces, square wood, pipes,and so on. Specifications: Material:Aluminium Alloy Package Includes: 1Piece Center Scriber Gauge note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item