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Key terms: center mm sizes inch gauge drill bit table set hole metric smaller increments diameter standard defined length chart morse shank step thou drill bit sizes jobber taper integer equivalents table cellspacing gauge size gauge drill bits commonly metric sizes center drill number gauge twist drill bits common use fractional most common mm diameter sizes are defined mm increments smaller sizes inch increments up routinely used conversion table metric drill bit sizes number and letter gauge drill Search external links cited by footnotes on Wikipedia page Drill bit sizes: |
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