Mitutoyo 395-371 Digital Spherical Face Micrometer, Inch/Metric, Ratchet Stop, Spherical Anvil/Spindle, 0-1" (0-25.4mm) Range, 0.00005" (0.001mm) Resolution, +/-0.0001" Accuracy, Meets IP65 Specifications Micrometer measures 0 to 1.0" (0 to 25.4mm) with 0.00005" (0.001mm) resolution and + or - 0.0001" accuracy, for measuring the wall thickness of tubing LCD screen displays in inches and metric units Spherical measuring faces are 0.59" in diameter and are carbide-tipped for durability Ratchet stop to help provide uniform pressure for precise, repeatable measurements Ingress Protection certified IP65 for protection against dust and water