Product description2 Pieces angle protractor angle finder ruler arm swing stainless steel protractor angle measure tool round head woodworking ruler with 0 - 180 degrees in 2 sizes for paint artist student geometryPractical and convenient scale angle finder ruler :With precision laser etching and clear accurate readings, our angle finder swing arm protractor is easy to read. The round head protractor has a 0 - 180 degrees semi-circle scale, can forward and reverse directions to measure any angles. The protractor arm can be adjusted to any angle you want, which is easy to use. And stainless steel material is sturdy and durable, not easy to rust, so can last for a long time.Specifications:Material: stainless steelColor: silverSmall angle finder ruler:Total length: 200 mm/ 7.87 inchRound head: 55 mm/ 2.17 inchFixed ruler scale: 100 mm/ 3.93 inchMovable ruler scale: 100 mm/ 3.93 inchLarge angle finder ruler:Total length: 360 mm/ 14.17 inchRound head: 55 mm/ 2.17 inchFixed ruler scale: 250 mm/ 9.84 inchMovable ruler scale: 300 mm/ 11.81 inchPackage includes:1 x 10 cm Angle protractor1 x 30 cm Angle protractorWarm tips:Please loose the screws first when using.Please be careful that the edge of the swing arm protractor is a little bit pointed when using.Please allow slight dimension error due to manual measurement.Please allow slight color difference due to different monitor.