It’s the toughest way to take a measurement. Nobody’s going to argue with your measuring when you whip out a Ruler Gun. Even if you believe the government is coming to take your guns away, they’re definitely not going to take your rulers away, right? Made in France and made of wood, this ruler only does the Metric system (as in: shoot this 2 liter bottle with your 9mm). Bang.
50 Pack Clear Plastic Ruler, 12 Inch Standard/Metric Rulers Straight Ruler Measuring Tool for Student School Office (Clear)