14" Parallel Glider Alvin Rolling Ruler

The 14” Alvin parallel glider drafting tool combines the features of several drawing instruments into one compact amazing tool: It functions as a straightedge, compass, triangle, protractor and more.

Use the Parallel Glider Drafting Tool to:

• Draw horizontal parallel lines: Hold glider firmly in place and draw a line across ruled edge. Move to next position and repeat.
• Draw vertical parallel lines: Place the pencil through one of the holes on the ruled edge and roll glider up or down to produce the line. Place pencil in another hole and repeat.
• Draw circles: Place a pin in a one of the holes on the ruled edge creating a pivot point and the center of the circle. Select a circle radius, place pencil in this corresponding hole, and rotate the glider around the pivot point with pencil to draw the circle or arc.
• Draw a angled line: Draw a straight line. Make a small mark where the angled line will intersect. Align the center of the glider at this point. The glider is also a protractor. Rotate glider so the original line lines up on the desired angle to draw. Draw the angled line using the ruled edge.
• Measure an angle: Place the ruled edge’s center at the angles vertex. Align the ruled edge with one line. Use the 2nd line to read the angle off the glider’s protractor.

The parallel glider is a remarkable tool that functions as a straightedge, compass, triangle, protractor and more.