These gages directly measure the diameter of chamfered holes. No setting master is necessary. When the three-blade plunger is pressed against a fl at surface, the gage should read the set number stamped on the back of the indicator. In case of wear, the gage may be adjusted to read the proper number. FEATURES When the three-blade plunger is pressed against a flat surface, the gage should read the set number stamped on the back of the indicator No setting master is necessary Internal gages will measure the largest diameter of any chamfer that has an included angle within the range of angles printed on the dial face Gages are also available with electronic indicators on request Deluxe Padded Case All ground surfaces are of hardened tool steel Indicators are AGD design SPECIFICATIONS Made in America: Yes Type: Chamfer Gage Range (in): 0 - 3/8" Dial Reading: For 90 -127 Degree Angles