Starrett 683M-2Z Millimetre Reading Internal Chamfer Gauge With Yellow Dial, 0-90 Degree Angle, 0-12.7mm Range

• All ground surfaces are of hardened tool steel
• Indicators are AGD design
• Internal gauges will measure the largest diameter of any chamfer that has an included angle within the range of angles printed on the dial face of the gauge
• Gauges furnished in deluxe padded case

These gauges directly measure the diameter of chamfered holes. No setting master is necessary. When the three-blade plunger is pressed against a flat surface, the gauge should read the set number stamped on the back of the indicator. In case of wear, the gauge may be adjusted to read the proper number.