The protractor is made of stainless steel material, it is not easy to rust, smooth edge, fine grinding, accurate measurement. 0-180 degree rotary swing, adjustable protractor arm locks into desired position with knurled thumb nut to quickly and easily identify angles. Suitable for setting bevels, draw radial lines, measuring and marking angles._x000D__x000D_Features_x000D__x000D_- Color: Silver._x000D_- Material: Stainless steel._x000D_- Size: 19.5 x 6 x 0.5 cm._x000D_- The ruler measurement range: 0-19.5cm._x000D_- Made of stainless steel, solid and durable, not easy to rust._x000D_- The is smooth, the inclination angle is accurate and sharp, so use it with careful._x000D_- Adjustable protractor arm locks into desired position with knurled thumb nut to quickly and easily identify angles._x000D_- When the measurement needs to be fixed, the screw can be tightened for easy operation._x000D_- The scale is accurate and the reading numbers are clear. It is widely used in industry and enterprise units and so on.Packing list:1 x Stainless Steel Protractor