TOL-15295

        SparkFun PCB Ruler - 12 Inch TOL-15295 One ruler to rule them all. This is a basic 12 inch ruler, but made from a PCB. We have included a lots of useful information on each side of the ruler that you might use on a daily basis including Wire Gauge holes, transistor diagrams, common fractions, Roman numerals, and metric to imperial conversions. Most importantly, the ruler provides you with a straight line and centimeter markings one side and inch markings on the other side. You'll also find a small protractor in the middle for all your angle measurement needs. While we figured you have a fairly good idea how to use a ruler we do have a tutorial to explain all the information you'll see! FEATURES                12 inch PCB ruler with markings down to 0.05" or 1/32" 30.48 cm PCB ruler with markings down to 0.1mm Electrical Equations such as Ohm's Law and Parallel Resistors Keyboard Alt Codes Color Wavelengths Protractor Metric Prefix Summary Chart Metric conversions Morse Code Transistor Diagrams Roman Numerals Fraction Summary Wire Guage Chart Tap and Drill Chart Size: 12"x 1.5"                                            https://www.sparkfun.com/products/15295/4‐17‐19