If you can follow the racing line but can't draw a straight line, this fun ruler will help without slowing you down.
Made of lightweight aluminum, this two-edged ruler is just over 8 inches (20cm) to fit more comfortably in a binder than the standard 12 inch (30cm) variety. One edge has inches with marks at every 1/16, and the other edge has centimeters with marks at every millimeter. Between the two is a fun full-color dashboard graphic, complete with a full gauge cluster. The graphics are so sharp, you might be surprised to find that the gauges do not work. Sold individually.