SHOCKWAVE Impact Duty™ 1/4" Drive to 3/8" Drive Adaptor

Milwaukee SHOCKWAVE Impact Duty™ 1/4" Drive to 3/8" Drive Adaptor

The Milwaukee 49-66-6720 SHOCKWAVE Impact Duty™ Adapter is a compact, heavy-duty solution for stepping up from 1/4" to 3/8" drive, giving your smaller tools the ability to handle larger sockets when the job calls for it. Built for impact use and high torque, it features a ball detent for secure socket retention and a dual hole + groove design for quick, reliable attachment. It’s a small piece of gear that quietly saves you from constantly swapping tools—or worse, realizing you grabbed the wrong one halfway through the job.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: 49-66-6720
• Brand: Milwaukee
• Product Type: Impact socket adapter
• Drive Conversion: 1/4" drive to 3/8" drive
• Compatibility: Optimized for use with impact wrenches and impact sockets
• Retention: Ball detent design for secure socket hold under torque
• Attachment Design: Dual hole and groove for easier, more stable connection
• Markings: Laser-etched size markings for quick identification
• Durability: Built for high-torque impact applications
• Standards: Meets ASME industry standards

Ideal For

• Stepping up from 1/4" to 3/8" drive sockets without switching tools
• Tight or fast-paced jobs where tool versatility saves time
• Automotive, mechanical, and general shop work using impact tools
• Anyone who prefers one tool doing more work (because fewer tool changes = more progress)