OD/ID Vernier Caliper Range 0 in to 12 in 0 mm to 300 mm Graduations 0.001 in Accuracy +/-0.001 in +/-0.03 mm Caliper Material Hardened Steel Dimension Type Inch/Metric Graduations - Lower Scale 0.001 in Graduations - Upper Scale 0.02 mm Jaw Actuation Type Slide Jaw Depth 2.18 in Maximum Measurement - Decimal Inch 12 in Maximum Measurement - Fractional Inch 12 in Maximum Measurement - mm 300 mm Measurements 4-Way Measures Depth Yes Measures Inside Dimension Yes