Carpenter Square Ruler 90 Degree Right Angle Ruler Engineer Measuring Tool, 501 Original

High Precision Knife Edge Woodworking Carpenter Square Ruler 90 Degree Right Angle Ruler Engineer Measuring ToolFeature:With heat treatment.With special hardening and fine grinding.Square high precision measuring tool.Suitable for testing angle and marking on parts.Specification:1#: 50x40mm/1.96x1.57''2#: 75x50mm/2.95x1.96''3#: 100x70mm/3.93x2.75''Material: high carbon steelSize(mm) working height (mm) width (mm) bottom width (mm) base thickness (mm)50x40 50 40 15 475x50 75 40 15.5 4.5100x70 100 70 20 5Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 1-2cm measuring deviation due to manual measurement.1 X Right Angle Ruler