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This page is here to present information that is useful in selecting and utilizing the proper drill or drills for whatever needs you may have.

Shows Drill Lengths for fractional drills.

Recommended drill sizes for most taps including metric, NF, NC, NS, and NPT thread taps.

Recommendations for pre-drilling for wood screws as well as drill lengths and an explanation of the anatomy of a wood screw.

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Drill Charts
Steel Types