SHOCKWAVE Impact Duty™ 3/4" Drive 4" Extension

SHOCKWAVE Impact Duty™ 3/4" Drive 4" Extension

The 49-66-6709 Milwaukee SHOCKWAVE Impact Duty™ 3/4" Drive Extension is a compact, heavy-duty 4" extension designed to deliver extra reach without sacrificing strength in high-torque applications. Built from forged impact steel and engineered for durability, it’s made to handle serious workloads while keeping your sockets locked in tight—because slipping off a fastener mid-impact is a quick way to ruin both your day and your knuckles.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 49-66-6709
• Brand: Milwaukee
• Product Type: Impact socket extension
• Drive Size: 3/4" input / 3/4" output
• Length: 4"
• Compatibility: Optimized for 3/4" drive impact wrenches and impact sockets
• Material: Forged impact steel for durability under high torque
• Retention Design: Ball detent ensures secure socket hold during use
• Attachment Features:
  • Dual hole design with groove for easier install and removal
• Markings:
  • Laser-etched size and part number for quick identification
• Standards: Meets ASME industry standards
• Performance: Designed to provide better access in tight or hard-to-reach areas
• Warranty: Lifetime guarantee (extensions and sockets only)

Ideal For

• Extending reach in tight or recessed fastener locations
• High-torque applications using 3/4" impact tools
• Mechanics and trades needing compact extensions with maximum durability
• Jobs where secure socket retention under load is critical
• Anyone who just needs “a little more reach”—without stepping up to a longer, bulkier extension