Qatalitic Rolling Ruler Rolling is a drawing tool for making parallel lines, hatching etc. Measures in centimeters and draws quadrants, squares circles, angles, crosshatching, and vertical and horizontal parallel lines quickly and easily. Functions as a compass, horizontal ruler, straightedge, protractor, circle template and angle template, all in one. With the help of this ruler , one can - Draw any angle parallel lines Draw perpendicular,and tabulate quickly Draw big or small circle and composing picture Material - Plastic Colour- Clear