Brown & Sharpe 599-579-12-5-1 Dial Caliper, Stainless Steel, Black Face, 0-12" Range, +/-0.001" Accuracy, 0.001" Resolution, Meets DIN 862 Specifications Precise dial graduations of 0.001", with one revolution equivalent to 0.100" Hardened stainless steel construction for corrosion resistance and long life 1.25" diameter rotating dial has a lock screw to hold the sliding jaw in position, to help ensure consistent measuring Covered rack keeps foreign matter from clogging the gear, to help prevent measurement error Linear accuracy meets DIN 862 standards