Features 1、There are laser scale on the ruler body, the reading is clear, the product range is 5-30mm 2、Micrometer is made of good-quality stainless steel, fine grinding bring long service life 3、Built-in force limiting device, provide accurate and repeated readings, very useful and helpful 4、Locking device, come with accurate mechanical structure, excellent performance, very practical 5、The box material is composite wood, bright as new, possess stable quality, and easy to take care Specification Item Type: Internal Diameter Micrometer Set Product Material: Stainless steel 304 Box Material: Composite wood Product Range: Approx. 5 ~ 30mm / 0.2 ~ 1.2in Resolution: 0.01mm Accuracy: 0.005mm Package List 1 x Internal Diameter Micrometer 1 x Adjusting Wrench 1 x Wooden Box