Carpenter’s Angle Square, Precision Angle Guide, Backgauge, Positioning Plate, Push Table Angle Backgauge. Model/Specifications Outer Packaging Dimensions Aluminum Base Weight Steel Base Weight. 30CM Protractor 36×13×7 cm 0.9 KG 1.2 KG. 60CM Protractor 66×13×7 cm 1.1 KG 1.5 KG. 80CM Protractor 86×13×7 cm 1.2 KG 1.6 KG. 1.0M Protractor 106×13×7 cm 1.3 KG 1.7 KG. 1.2M Protractor 126×13×7 cm 1.4 KG 1.8 KG.