The Starrett 120 Series Dial Calipers are the only American made dial calipers. These calipers are used by mechanics and tool-makers everywhere. Features include direct reading, ease-of-handling, reliability and accuracy making these one of the handiest measuring tools available. These calipers come with a fitted plastic case and a standard letter of certification. FeaturesOnly American made dial caliperDirect reading, reliable and accurateOne hand use with thumb-operated, fine adjustment rollKnife edge contacts for both inside and outside measurementsStainless Steel Material.001" Graduations.100" Revolution Range.100" Bar Graduations+/- .001" Accuracy0-6" Range