Features 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、Anti‑slip ratchet prevents slipping, while the smooth surface enables better fitting to the components. 4、Allows for flexible application in the measurement of high‑accuracy products and accuracy parts. 5、The wooden box makes the carrying and storage much more convenient for daily use. Specification Item Type: Outside Micrometer Product Material: Aluminium Alloy Storage Box Material: Compressed Wood Measuring Range: Approx. 0 ~ 100mm / 0 ~ 3.9in Measurement Accuracy: 0.01mm Product Application: Measuring the outer diameter of high-accuracy products and accuracy parts. Package List 4 x Outside Micrometer 3 x Extension Bar 1 x Wrench 1 x Wooden Storage Box 1 x User Manual