1/4" x 12" HSS Aircraft Extension Drill Bit

The 1/4" x 12" HSS Aircraft Extension Drill Bit is designed for deep-hole drilling and reaching confined or difficult areas where standard drill bits cannot reach. Manufactured from high-speed steel (HSS), this drill bit provides durability, heat resistance, and dependable cutting performance for demanding drilling tasks.

The 12-inch extended length allows access through assemblies, structural components, tubing, and tight spaces, making it ideal for aircraft work, fabrication, automotive repair, and maintenance applications. Its long reach allows precise drilling while maintaining stability and control.

This aircraft extension drill bit is suitable for metalworking, sheet metal fabrication, automotive service, aircraft maintenance, and general shop use, providing the reach required for specialized drilling jobs.

Features & Benefits

• 1/4" diameter drill bit
• 12" aircraft extension length for deep or hard-to-reach drilling
• High-speed steel (HSS) construction for durability and heat resistance
• Ideal for assemblies, tubing, and confined spaces
• Suitable for steel, aluminum, plastic, and other materials

This aircraft extension drill bit delivers extended reach and reliable drilling performance for professional and workshop applications.

In-stock items usually ship within 2 business days but can take up to 7 business days. Shipping time starts once your order heads out the door.