Starrett Electronic Micrometer Head with Non-Rotating Spindle This Starrett Electronic Micrometer Head with Standard Millimeter Graduations on Shell and Thimble includes 0-1"/0-25mm range, ratchet stop, lock nut, carbide face, and non-rotating spindle. Featuring large digital readout that is easy to read and reduces errors. Features Include... 0 - 1" / 25.4mm Measuring Range 0.00005" / 0.001mm Resolution Accuracy +0.0001 / 0.002mm Starrett no-glare satin chrome finish on thimble and sleeve. Large, easy-to-read .275 (7mm) high contrast LCD digital readout Extremely hard and stable one-piece spindle Auto Off after 20 minutes of nonuse Inch/millimeter conversion on English versions Smooth friction thimble for uniform pressure Measurement HOLD button Zero at any position Retain and return to true zero reading Spindle lock Data Output PRESET button to install any reading at any position Ability to install minimum and maximum limits