9/64" SHOCKWAVE Impact Duty™ RED HELIX™ Titanium Drill Bit

The Milwaukee 48-89-4606 is a 9/64" SHOCKWAVE™ Impact Duty RED HELIX™ titanium drill bit, built for high-performance drilling in metal, wood, and plastic, especially when using impact drivers.

This is part of Milwaukee’s impact-rated drill bit lineup, which is different from the Thunderbolt bits you’ve been listing—these are specifically reinforced for higher torque and impact use.

Key Features

• Impact-rated design (SHOCKWAVE™) – built to handle impact drivers as well as drills
• RED HELIX™ variable flute – aggressive helix (35° → 15°) improves chip removal and reduces heat
• QUAD EDGE™ tip – four cutting edges for faster starts and smaller chips
• 135° split point tip – prevents walking and improves accuracy
• Titanium coating (TiN) – extends life up to ~3–5× vs black oxide bits
• 1/4" hex shank – quick-change compatible and ideal for impact drivers

Specs

• Size: 9/64 in (0.1406")
• Length: ~2.6 in
• Shank: 1/4" hex
• Material: High-speed steel (titanium-coated)
• Use: Metal, wood, plastics
• Pack size: Typically sold as single bit

Best Uses

• Pilot holes for small fasteners
• Sheet metal and thin steel drilling
• Electrical and HVAC work
• Wood and plastic drilling with impact drivers
• Jobsite use where quick bit changes matter

Bottom Line

The 48-89-4606 is a small, impact-rated titanium drill bit, built for speed, durability, and convenience with hex-shank tools. Compared to the 48-89-28xx Thunderbolt bits, this one is more advanced, longer-lasting, and optimized for impact drivers, not just standard drills.