Graduation: 0.0001'' Two interchangeable anvils - Flat & Round precision ground and hardened Nice Fitted Case Measuring Range: 0-1'' X 0.0001'' Wide Measurement Range: Capable of measuring 0-1" and 1-2" ranges with provided anvils of diameters 0.118" (3mm) and 0.196" (5mm). Versatile Measurement: Equipped with flat and round interchangeable anvils for measuring complex shapes like tubing walls and screw heads. High Precision: Graduated in .001" or 0.01mm with a resolution of 0.0001", ensuring detailed and accurate readings. Durable Construction: Features a carbide face on the spindle and a satin chrome finish for enhanced longevity and resistance to wear. User-Friendly Design: Incorporates a ratchet thimble and lock nut for precise adjustments and secure settings. Compact Measurement Range: Offers a measuring range of 0-1" with an anvil diameter of 0.118" (3mm) for focused precision.