Features High quality alloy measuring heads can be used for various internal size measurement, fine workmanship and no burr Clear laser marking line for convenient reading The main micrometer body is made of stainless steel with chrome plated surface, wear-resisting and durable Designed with locking device, precise machinery structure make it more intuitive and convenient to read Built-in ratchet stop device ensures accurate repetitive readings Specifications: Type: Inside micrometer Measuring Range: 5mm~30mm Material: Stainless steel Precision: 0.01mm Weight: 268g(approx.) Package Includes: 1 x Inside Micrometer 1 x Wrench 1 x Calibration Ring 1 x Packing Box Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List