180° Protractor Round Head Rotary Metal Angle Ruler Arm Ruler DIY Tool Equipment
Or 360° : 1 2 in 1 digital Angle ruler (1 x CR2032 3V lithium battery). 180° : 1 Angle ruler. Used to draw radial lines, set bevel and transfer angles. 180° Length: 100 mm. 0-180° and 360° dual scale.