Feature:1. Including 4 micrometers, and each micrometer has its own measuring range to meet your measuring needs.2. Through laser marking, the clear scale on the micrometer enables easier and more accurate reading.3. Antislip ratchet prevents slipping, while the smooth surface enables better fitting to the components.4. Allows for flexible application in the measurement of highaccuracy products and accuracy parts.5. The wooden box makes the carrying and storage much more convenient for daily use.Specification:Item Type: Outside MicrometerProduct Material: Aluminium AlloyStorage Box Material: Compressed WoodMeasuring Range: Approx. 0 ~ 100mm / 0 ~ 3.9inMeasurement Accuracy: 0.01mmProduct Application: Measuring the outer diameter of high-accuracy products and accuracy parts. .Package List:4 x Outside Micrometer3 x Extension Bar 1 x Wrench1 x Wooden Storage Box1 x User Manual