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Drill Bit Size Conversions

Convert drill bit sizes between fractional inches, decimal inches, mm, letter (A-Z), and number (#1-#80).
Find the right bit for clearance and tap holes.

Drill Bit Size Converter

Convert drill bit sizes between fractional inches, decimal inches, mm, letter (A-Z), and number gauges (1-80). Full cross-reference chart for metalworking.
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