Product Description2 Parts Diameter Angle Protractor Viewfinder Ruler Arm Swing Stainless Steel Protractor Measuring Angle Measuring Tool Round Head Woodworking Ruler with 0 - 180 Degrees in 2 Sizes for Artist Painter Studying Geometry Geometry Geometry Practical and Practical Scale Angle Search Rule: With Precision Laser Engraving and Clear Precise Readings, our angle viewfinder swingarm protractor is easy to read. The round-headed protractor has a semicircle scale from 0 to 180 degrees, can move forward and backward to measure all angles. The protractor arm can be adjusted to any angle you want, which is easy to use. And the stainless steel material is sturdy and durable, not easy to rust, so can last a long time. Specifications:Material: Stainless SteelColor: SilverSmall Angle Search Rule: Total Length: 200mm/7.87in Round Square: 55mm/2.17 inchFixed Ruler Scale: 100mm/3.93 inchMobile Ruler Scale: 100mm/3.93indWide Angle Search Rule: Total Length: 360mm/14.17indLe round mesh: 55mm/2.17inFixed ruler scale: 250mm/9.84 inchmobile ruler scale: 300mm / 11.81 inchPackage includes: 1 x 10 cm Angle Protractor1 x 30 cm Angle ProtractorWar Features: Please loosen the screws first when using. Please be careful that the edge of the swingarm protractor is a little sharp when using. Please allow a slight dimension error due to manual measurement. Please allow a slight color difference due to different monitors.