7 Inch Triangle Ruler Aluminum Alloy Measuring Square Ruler High Precision Metric Imperial Angle Ruler for Woodworking Carpentry. Features: Aluminum Alloy Durability, Precision Angles, Dual-Scale Convenience, Versatile Functionality, and Etched Clarity. Specification: Origin Mainland China, Size 255x185x10mm/10.04x7.28x0.39inch, Style Metric/Imperial Options Available, Material Aluminum Alloy.