3/8" SHOCKWAVE Impact Duty™ RED HELIX™ Titanium Drill Bit

Milwaukee 48-89-4621 — Product Description

The Milwaukee 48-89-4621 is a 3/8" SHOCKWAVE™ Impact Duty RED HELIX™ titanium drill bit, designed for heavy-duty drilling in metal, wood, and plastic, especially when using impact drivers or high-torque drills.

This is one of the larger SHOCKWAVE bits you’ve listed so far, used for bigger clearance holes and structural fasteners.

Key Features

• Impact-rated (SHOCKWAVE™) – built for drills and impact drivers under high torque
• RED HELIX™ flute design – variable helix (35° → 15°) improves chip removal and reduces heat buildup
• QUAD EDGE™ tip – four cutting edges for faster starts and cleaner cutting
• 135° split point – reduces walking and improves accuracy
• Titanium coating (TiN) – up to ~3× longer life vs standard black oxide bits
• 1/4" hex shank – quick-change compatible for impact drivers

Specs

• Size: 3/8" (0.375")
• Shank: 1/4" hex
• Material: Titanium-coated high-speed steel
• Overall length: ~4.6"
• Use: Metal, wood, PVC, plastics
• Pack: Typically sold individually

Best Uses

• Large pilot holes for anchors and structural fasteners
• Metal stud and sheet metal drilling
• Wood framing and heavy construction
• Electrical/HVAC installs with larger conduit needs
• High-torque drilling with impact drivers

Bottom Line

The 48-89-4621 is essentially a heavy-duty 3/8" impact-rated drill bit:

• Much stronger under torque than standard jobber bits
• Designed for fast chip evacuation and cooler cutting
• Built for jobsite durability with impact drivers
• One of the larger “workhorse” sizes in the SHOCKWAVE lineup