Mitutoyo Digital Micrometer
When you need to measure something with the utmost accuracy, a simple ruler or tape measure won't do. What you need is a tool like the Mitutoyo Digital Micrometer. IP65 compliant, it has a range of 0-25mm (0-1"), with a resolution of 0.001mm (0.00005"), and accuracy of plus or minus 0.00005". An LCD screen makes it easy to see your readings in either unit, and the measuring faces are carbide-tipped for durability.