5/32" SHOCKWAVE Impact Duty™ RED HELIX™ Titanium Drill Bit

The Milwaukee 48-89-4607 is a 5/32" SHOCKWAVE™ Impact Duty RED HELIX™ titanium drill bit, designed for high-performance drilling in metal, wood, and plastic, especially when using impact drivers.

This is part of Milwaukee’s SHOCKWAVE impact-rated lineup, which is built tougher than standard drill bits to handle high torque and repeated impact use.

Key Features

• Impact-rated (SHOCKWAVE™) – engineered for both drills and impact drivers
• RED HELIX™ variable flute – aggressive helix improves chip removal and reduces heat
• 135° split point tip – starts on contact and prevents walking
• Titanium coating (TiN) – delivers up to ~3× longer life vs black oxide bits
• QUAD EDGE™ cutting tip – creates smaller chips for faster drilling and less heat buildup
• 1/4" hex shank – quick-change compatible, ideal for impact drivers

Specs

• Size: 5/32 in (0.156")
• Length: ~2-3/4 in overall
• Flute length: ~1"
• Shank: 1/4" hex
• Material: Titanium-coated high-speed steel
• Use: Metal, sheet metal, wood, PVC, plastics

Best Uses

• Pilot holes for #10–#12 screws (typical range)
• Sheet metal and light steel drilling
• Electrical, HVAC, and install work
• Fast drilling with impact drivers
• Jobs where quick bit changes matter

Bottom Line

The 48-89-4607 is basically the impact-driver version of a 5/32" drill bit. Compared to the 48-89-28xx Thunderbolt bits you’ve been listing, this one is:

• Stronger under torque
• Faster at chip removal
• Longer lasting (titanium coating)
• Made for hex quick-change tools