Inside Micrometer, Inside Diameter Gauge, Hole Bore 5-30mm, Accuracy Range 0.01mm, Wrench + Calibrat Product Parameters: Product Name: Inside Micrometer Specification5-30/25-50/50-75/75-100mm Calibration Process: Laser Calibration Force Measuring Type: Inner Diameter Measurement Product Specifications: Various Specifications Measurement Type: Internal Dimension Measurement Resolution: 0.01mm Accuracy: 0.005mm / 0.006mm Our Product Advantages: 1. Four Times Laser Marking, Clear And Intuitive Reading. 2. High-quality Steel Alloy Measuring Surface Measuring Precision Aperture. 3. The Shell Is Chrome-plated, Beautiful And Wear-resistant. 4. Ratchet Lock Knob To Maintain Constant Measuring Force. 5. Spiral Anti-skid Treatment, Stable And Error-free. Package: If you buy this product, you will receive 1 inside micrometer + 1 spanner + 1 calibration ring + 1 box of gauges. wooden packing.