Engineering Set Squares

Set Squares - Scholar - Set of 4 Drafting Rulers are combination of 10" and 12" professional triangles, Scale - 12" and Protractor - 6" (360 degrees) made of clear plastic Bevel Edge with Protractor. 25cm/10"-degrees , 30cm/12"-60 degrees ; Thickness - 2.5 mm 1.Set squre 2.Protractor 3.scale 12"