Fowler 54-860-777 IP54 Digital Micrometer and Stand Inspection Set, 0-1"/0-25mm Measuring Range, 0.00005"/0.001mm Resolution, RS-232 Output Digital outside micrometers with a 0 to 1" measuring range and flat anvil/spindle pair and folding stand for general purpose measuring LCD performs direct inch/metric conversions and has a switchable resolution of 0.00005" and 0.001mm Friction thimble provides smooth and quiet operation, and is suitable for one-handed operation Certified IP54 for dust and water protection and ABS housing provides durability and protection of electrical components RS-232 output provides ability to export readings to a computer (cable not included)