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.
|Dimensions||:||6-1/2 in L x 2-1/2 in W|
|Suitable for||:||16 in to 1/2 in Fractional Size Bit|