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Drill Bits are Boring
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By: Harry Sawyers
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Photo:  Keate

Versatile Workhorse

The familiar twist bit is used for drilling holes up to half an inch in diameter in most any material. Tough titanium nitride coats this high-speed steel bit, so it resists rust, spins with less friction, and holds an edge longer than uncoated or black-oxide-coated steel. $3.30 for the 1/4-inch shown; in sizes from 1/16 to 1/2 inch; stanleypta.com

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