Milwaukee Shockwave Impact Duty 49-66-6742 4-Piece Drive Adapter Set 1/4–1/2 in

Get more versatility from your impact socket collection with the Milwaukee Shockwave Impact Duty 49-66-6742 4-Piece Drive Adapter Set. Designed for 1/4, 3/8 and 1/2 in square-drive tools and sockets, these adapters help bridge different drive sizes during equipment maintenance and jobsite repairs.

When the socket you need does not match your wrench's drive, select the appropriate adapter by its laser-etched size marking. Forged impact steel construction supports demanding use, while ball detents help retain the socket as you work.

Key Features

• Four-piece adapter set for versatility across 1/4, 3/8 and 1/2 in drive tools and impact sockets.
• Forged impact steel construction for durability in high-torque applications.
• Laser-etched size markings and part numbers for identification.
• Dual-hole design and ring groove for easier attachment and removal.
• Ball detent design for impact socket retention.
• Meets ASME industry standards.

Specifications

• Brand: Milwaukee
• Series: Shockwave Impact Duty
• Model: 49-66-6742
• Pieces: 4
• Drive size range: 1/4 to 1/2 in
• Drive sizes supported: 1/4, 3/8 and 1/2 in
• Material: Chrome molybdenum steel
• Color: Black
• Listed length: 1.97 in
• Listed width: 3.87 in
• Listed height: 3.35 in
• Listed weight: 0.38 lb

Frequently Asked Questions

What do these adapters do?

They connect a square-drive tool to a socket with a different drive size. Match both ends of the adapter to your wrench and socket before use. Drive size is the square connection size, not the size of the fastener the socket fits.

Can I use them with an impact wrench?

Yes. The Shockwave Impact Duty adapters are designed for impact applications with compatible 1/4, 3/8 and 1/2 in drive tools and impact sockets. Use impact-rated sockets and follow the operating limits of the tool, adapter and socket.

Does adapting to a smaller socket drive increase its torque capacity?

No. An adapter changes the connection size, not the strength or torque rating of the smaller socket or drive components. Stay within the manufacturer's limits for every component and avoid applying a larger wrench's full output without checking those limits.

Are these insulated adapters for electrical work?

No electrical insulation rating is specified for this set. Do not treat these steel adapters as insulated tools or use them as protection against energized conductors. Follow your crew's electrical safety procedures and use appropriately rated equipment where required.