VEVOR 4 PCS Micrometer Set, 0-1"/1-2"/2-3"/3-4" Machinist Outside Micrometer, Ultra-Precision 0.0001 Accuracy, Professional Machinist Tools with Protective Case, for Metalworking & EngineeringHigh-Precision Micrometer SetClear ReadingsPrecise & SturdyBlue Metal BodyMultiple UsesWide ApplicationRange 1-2 in: Accuracy ±0.0002 in (±0.004 mm),Range 3-4 in: Accuracy ±0.0002 in (±0.005 mm),Product Dimensions (3-4 in range): 8.26 x 4.33 x 0.86 in / 210 x 110 x 22 mm,Locking Device: Yes ,Item Model Number: 5201-4,Range 2-3 in: Accuracy ±0.0002 in (±0.005 mm),Range 0-1 in: Accuracy ±0.0001 in (±0.003 mm),Unit System: Imperial units only, non-switchable,Standard Bar Lengths: 1 in / 25.4 mm, 2 in / 50.8 mm, 3 in / 76.2 mm ,Net Weight: 4.23 lbs/1.92 kg