PCB Reference Ruler, Measuring Tool for Arduino Electronic EngineersProduct Description:Now you can have a reference board at your fingertips, with this Arduino PCB Reference Ruler.PCB Ruler with many different foot prints for SMD parts, wire gauges, PCB track gauges, electrical symbols etc.Package Dimensions6.1″ x 1″ x 0.1″Edges are labeled in Inches, marked with 1/8″ Divisions and Centimeters, marked with 0.1cm DivisionsIt also has font size guide, trace-width diagram, and a set of AWG-sized holes so you can gauge your wire sizeRuler has the most common component packages you’ll encounter.UNKRP013150