FEATURES • Wide measuring range provided by combining extension rods. • Carbide-tipped measuring faces. • Travel of micrometer head:50mm/2" • Diameter of extension rod: 28mm/1.1" • Graduation: 0. 01mm or 0.001" • Accuracy: 7+n+L/50(μm)(Metric)* or 0.00005"(7+n+L/2)(Inch)* *L=max. measuring length (mm or inch);n=number of rods • With carry case.