SparkFun PCB Ruler - 12 Inch

Description
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!
Get Started with the How to use a Ruler Guide
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"