7/16″ Aircraft Extension Drill Bit – 12″ OAL – HSS – 135° Split Point – NAS Type B – DBAC12-7/16

The DBAC12-7/16 aircraft extension drill bit is designed for extended reach drilling with a 12″ overall length and a 7/16″ cutting diameter. Constructed from high-speed steel and finished with black oxide, it delivers high durability and wear resistance. The 135° split point provides self-centering performance and minimizes thrust, while the jobber-length flutes offer reliable chip evacuation. Ideal for use in metal fabrication, the bit conforms to NAS 907 Type B standards for aircraft use.