Drill Bits are Boring

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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