5/16" SHOCKWAVE Impact Duty™ RED HELIX™ Titanium Drill Bit

The Milwaukee 48-89-4617 is a 5/16" SHOCKWAVE™ Impact Duty RED HELIX™ titanium drill bit, built for high-torque drilling with impact drivers or standard drills.

This is a larger step up in the SHOCKWAVE size progression, moving into heavier-duty drilling and larger fastener holes compared to the 4606–4611 range.

Key Features

• Impact-rated (SHOCKWAVE™) – engineered for both drills and impact drivers
• RED HELIX™ variable flute – aggressive 35° → 15° helix improves chip removal and reduces heat
• QUAD EDGE™ tip – faster starts with smaller chips for smoother drilling
• Titanium coating (TiN) – up to 3–5× longer life vs black oxide bits
• 135° split point tip – prevents walking and improves accuracy
• 1/4" hex shank – quick-change compatible for impact drivers

Specs

• Size: 5/16 in (0.3125")
• Overall length: ~4.37 in
• Shank: 1/4" hex
• Material: Titanium-coated high-speed steel
• Use: Metal, wood, plastics
• Pack size: Typically sold as a single bit

Best Uses

• Drilling holes for 5/16" bolts and hardware
• Clearance holes for 1/4" fasteners
• Medium-duty metal drilling
• Wood framing and construction
• Electrical / HVAC installs using impact drivers

Bottom Line

The 48-89-4617 is basically the impact-driver version of a 5/16" drill bit:

• Built for higher torque and heavier drilling
• Removes chips faster → runs cooler and lasts longer
• Stronger than standard jobber bits under load
• Designed for quick-change hex tools