Century Drill & Tool Aircraft Drill Bits 5/16 X 12" Flute Length 3-3/16"

Aircraft drill bits. Aircraft extension drills are surface treated high speed steel with 135 degree quick-cut points that will not walk or wander. Designed for drilling through materials less than 4" thick. Extension drills are used in areas where extra reach is important.

Designed for drilling through materials less than 4-Inches thick Extension drills are used in areas where reach is important Aircraft extension drill bits are surface treated high speed steel with 135 Degree quick-cut points that will not walk or wander Overall length is 12 inches