Digital Calipers Hand Tools, Measuring

Why use calipers instead of a ruler? In a word, accuracy. A ruler and your eyeball might be fine for many scenarios but not when it comes to making sure your machine mills at a depth of 0.003″ and not 0.006″ or 0.001″. Why use digital calipers instead of dial calipers? It’s much easier to read digital calipers, and they’re often not any more expensive or less precise than dial calipers. Unless you’re really old-school or you just love dials, digital calipers are the way to go.