Item Name: Stainless Steel Measuring Ruler 180 Degree Protractor Round Finder Angle Gauge. Weight: about 80gColor: silverMeasuring length: 14.5 cmSemi-circle scale: 0-180 Material: stainless steelFeature:1.The whole ruler is made of stainless steel, which is not easy to rust and is durable.2.180 degree ruler can easily remove the ruler and semicircle through the knob.3.This 180 protractor is accurate in scale, it will be a good helper for you to learn and carpentry work, it is very suitable to be installed in your tool bag.Package include: 1pc ProtractorNotes: The product may have an error of 1-2cm,and the color may look a little different from the picture,pls understand. *