Product description Range:0.2-1.2" | Resolution:0.001" | Measurement accuracy:+/-0.00025" | Part Number:145-193 The Mitutoyo 145 series vernier inside micrometer has caliper-type jaws and a vernier scale in inch units for making precise inside dimension (ID) measurements. The micrometer is made of high-grade tool steel for durability and has a satin chrome rust- and glare-resistant finish. The measuring faces are carbide-tipped for wear resistance. The vernier scale is graduated to 0.001. A locking clamp helps hold measurements in place. The micrometer comes with a fitted case for storage. Micrometers are precision measuring instruments that use a calibrated screw to measure small distances. These measurements are translated into large rotations of the screw that are then able to be read from a scale or a dial. Micrometers are typically used in manufacturing, machining, and mechanical engineering. There are three types of micrometer: outside, inside, and depth. Outside micrometers may also be called micrometer calipers, and are used to measure the length, width, or outside diameter of an object. Inside micrometers are typically used to measure interior diameter, as in a hole. Depth micrometers measure the height, or depth, of any shape that has a step, groove, or slot. Mitutoyo manufactures precision measuring tools, metrology equipment, and systems. The company was founded in Tokyo in 1934 and formed Mitutoyo America Corporation in 1963, which is headquartered in Aurora, IL. Product details Range: 0.2-1.2" | Resolution: 0.001" | Measurement Accuracy: +/-0.00025" | Part Number: 145-193 Product Dimensions: 5.4 x 2.6 x 1.1 inches ; 1.7 pounds Shipping Weight: 5.1 pounds (View shipping rates and policies) Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues. International Shipping: This item can be shipped to select countries outside of the U.S. Learn More ASIN: B0006J4506 Item model number: 145-193 Caliper-type jaws for making inside dimension (ID) measurements Vernier scale in inch units for taking precise inside dimension (ID) measurements Locking clamp to hold measurements in place Satin chrome finish helps resist rust and reduce glare Carbide-tipped measuring faces helps provide wear resistance Product Specifications Part Number 145-193 Maximum Measurement 0.2-1.2" UPC 603908043348 , 603908084150 EAN 0603908084150 , 4946368019956 , 0603908043348 Inside Depth 10.5 inches Item Weight 1.7 pounds Material Steel Measurement Accuracy +/-0.00025" Model Number 145-193 Number of Items 1 Range 0.2-1.2" Resolution 0.001" Size 0.2-1.2" Specification Met Style Vernier See more Specification for this product family Measurement System Inch Brand Name Mitutoyo Manufacturer Series Number Series 145 UNSPSC Code 41111601