Industrial & Scientific" /> Micrometer measures 0 to 1.0" (0 to 25.4mm) with 0.00005" (0.001mm) resolution and + or - 0.0001" (0.002mm) accuracy, for taking outside diameter measurements LCD screen displays in inches and metric units Friction thimble to help provide uniform pressure for precise, repeatable measurements Measuring faces are flat and are carbide-tipped for durability Turns off after 20 minutes of idle time and turns on with a twist of the spindle for convenience