Facilitates checking of External Diameter with Precision and Speed.Smooth and anti-rotational movement of measuring spindle by guide pin.Repeatability: 0.001 mmTungsten Carbide measuring anvils.Range (In mm): 0-25, 25-50, 50-75, 75-100, 100-125, 125-150, 150-175, 175-200, 200-225.