Twist drill sets may be sized using several methods. Which option is NOT listed as a sizing method?

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Multiple Choice

Twist drill sets may be sized using several methods. Which option is NOT listed as a sizing method?

Drill sizes are defined in a few standard coding systems that shops commonly use: fractional inches (like 1/4", 3/8"), letter gauges (A, B, C, etc.), and numeric sizes (1, 2, 3, up to high numbers). Metric sizes in millimeters are another widely used system. Decimal inches aren’t treated as a separate sizing scheme in these catalogs; they’re just a way to express an inch size in decimal form, derived from the other systems, not a distinct method used to categorize drill sets. That’s why Decimal Inches is the option that isn’t listed as its own sizing method.

Drill sizes are defined in a few standard coding systems that shops commonly use: fractional inches (like 1/4", 3/8"), letter gauges (A, B, C, etc.), and numeric sizes (1, 2, 3, up to high numbers). Metric sizes in millimeters are another widely used system. Decimal inches aren’t treated as a separate sizing scheme in these catalogs; they’re just a way to express an inch size in decimal form, derived from the other systems, not a distinct method used to categorize drill sets. That’s why Decimal Inches is the option that isn’t listed as its own sizing method.

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