1. Aluminum Alloy: Made of high-quality aluminum alloy, this center marking gauge is - and built to last. Its undergoes anodized treatment for long-term durability. 2. Compact & Portable: this gaging center gauge is designed to be small and portable, making it easy to carry around. The precise scale markings on the ruler accurate measurements. 3. Versatile Woodworking Tool: This gauge vernier caliper is widely applicable for marking and measuring on curved surfaces, square surfaces, creating perpendicular lines, finding the center point on curved surfaces, and more. It's a must-have for woodworking projects. 4. Practical Design: The design of this precision gauge is simple yet highly practical. It enables efficient and precise marking and measuring, saving you time and effort in your woodworking tasks. 5. Accurate Angle Measurement: The markings on the round bar mark finder provide clear and precise angle measurements. This ensures accuracy in your woodworking projects, allowing you to achieve precise angles and measurements consistently. Specifications: Inch : Metalworking Model Number: Gauges Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Material: Aluminum alloy colour: blue Package Contents: 1 x Center Scribe Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.