What is the size range for twist drills measured in inches?

The size range for twist drills is typically between 1/16 inch to 4 inches or larger. This range covers both very small drills used for delicate work and large drills suitable for heavier applications. Twist drills are commonly used in various settings, including aviation, for drilling precise holes in different materials. The option which indicates this range accurately reflects the standard manufacturing sizes available in the industry, allowing for versatility in applications. This range supports the need for a drill that can handle both fine and larger diameter holes, meeting the diverse requirements of structural and mechanical work in aviation and related fields.