Center Measuring Tool Portable Center Gauge for Engineering Building Drawing Description: [High Quality]Aluminum alloy right angle woodworking tools gauge, which with high strength and quality, and not easy to break to ensure long time convenient usage. [Practical Protractors]this multifunctional ruler apply to round surface, square surface, right angle center line, round surface to find the center point and other carpentry scribing measurement marks. [Accurate measurement]The woodworking squares are scaled, clearly marked, accurate in measurement and easy to read. [Wide application]The center line gauge used for precise scribing, suitable line drawing measurements such as woodworking. Specifications: Material: Aluminum alloy Size Chart: 14.8cmx9.1cm/5.83inchx3.58inch Package Includes: 1 Angle Measuring Ruler