The hole sizes and decimal equivalents are permanently etched on face so they won't wear off with repeated use. Number size drills 61 to 80. Fractional size drills 1/16 to 1/2 in x 64 ths. Metric range from 0.062 to 0.500 mm. This gage has been crafted to meet government specifications.
Manufacturer: GENERAL Model Number: 14 UPC: 038728220097
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