Calipers are the easiest and most accurate tool to use when you need a precise measurement of width, height, or depth. These digital calipers instantly give you a precise value, that is displayed on an easy to read LCD screen. The display can be switched between metric and imperial measurements by the simple press of a button and it is accurate to 0.02mm or 0.001". There is a micro adjusting thumbwheel that is extremely useful for taking fine measurements. The display can be zeroed at any point which is ideal for taking relative measurements.