1/4" x 12" Aircraft Length Black Oxide Drill Bit

Milwaukee 48-89-2772 — Product Description

The Milwaukee 48-89-2772 is a 1/4" x 12" Aircraft Length Black Oxide Drill Bit, designed for deep reach drilling in metal, wood, and plastic where a standard-length bit won’t reach.

It belongs to Milwaukee’s Aircraft Length (extended reach) drill bit series, which is focused on deep holes and tight access drilling, not just hole size.

Key Features

• 12-inch overall length – provides extra reach for deep or obstructed areas
• 135° split point tip – starts on contact and helps prevent walking for accurate drilling
• Black oxide coating – reduces friction and helps resist corrosion
• Parabolic flute design – improves chip removal for faster drilling
• 3-flat Secure-Grip shank – reduces slipping in the drill chuck and improves grip

Specs

• Diameter: 1/4"
• Overall length: 12"
• Flute length: ~2-3/4"
• Material: High-speed steel (HSS)
• Finish: Black oxide
• Use: Metal, wood, PVC, plastics

Best Uses

• Drilling deep into studs, framing, or assemblies
• Running wires, conduit, or fasteners through thick material
• HVAC, electrical, and plumbing installations
• Any situation where access depth matters more than hole size

Bottom Line

The 48-89-2772 is not a heavy structural “big hole” bit like the S&D series you were seeing earlier—it’s a long-reach 1/4" aircraft bit, built for getting into tight, deep, or hard-to-reach areas.