Kewer rolling ruler good for drawing vertical lines, parallel lines, charts, angles, 3-d drawings, horizontal lines, circles, graphs, musical-note. Each centimeter has a circle hole for drawing circles and ellipses. This drawing ruler is built in roller, clear scale, easy sliding, stable drawing, easy to observe. The measuring rolling ruler is a good helper for your work or study. It can help students develop their own manual skills as well as their imagination to draw different design pictures.
Measuring rolling ruler is with protractor, sliding roller, parallel scale, circle, auxiliary drawing. 
 
Item Name: Rolling Ruler
Material: Plastic  
Features: Transparent, Measuring Ruler, Durable
Size: 30cm 


Draw Horizontal Parallel Lines
Hold the centre of the ruler and roll it up/down to draw the straight parallel lines.


Draw Vertical Parallel Lines
Place the pencil in any hole and roll the up or down to produce a vertical line. Parallel certical lines can be produced by placing the pencil in the other holes.


Draw Circle and Arcs
Place the pencil in any hole to act as a pivot. Place another pencil in any hole and swing the ruler to produce an arc or circle. Circle of up to  60cm diametre can be drawn this way



Draw Angles
First draw a horizontal line. Then place the ruler against the line using the protractor guide to get any desired angle