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Drill Size Chart help Identify and convert Drill Size

30 August 2011

This is a drill bit table chart to help with converting bits from metric to imperial or number series. All of the drill bits included in our web site are good quality cutting tools manufactured from high speed steel as a minimum. Our range starts at 0.3mm. Cobalt drill bits and imperial or inch drills are available on request. Apparently the twist drill bit was invented by Steven A Morse back in 1861.