Klein 66009 4-in-1 flip quad socket displaying 1/2, 5/8, 3/4, and 9/16-inch sizes beside its 1/2 to 3/8-inch square drive adapter.
Diagram detailing the 4-in-1 quad socket mechanism, corrosion-resistant black coating, impact rating, and color-coded identification rings.
Technical infographic illustrating 4 hex socket sizes and 1/2-inch to 3/8-inch square drive adapter conversion capability.
Vertical view of the Klein 66009 flip quad socket mounted on its nested 1/2-inch square drive impact adapter.
Reversible Klein 4-in-1 quad impact socket separated from its 3/8-inch male square drive extension adapter.
End-view perspective of the 12-point socket geometry showing the internal spring-loaded coaxial sleeve mechanism.
Top-down view inside the 12-point dual-ended flip socket highlighting the coaxial spring-loaded 1/2 and 5/8-inch drive profiles.
Side view of the Klein 66009 flip quad socket highlighting laser-etched SAE size callouts and high-visibility color bands.
Direct top-down view showing the 12-point socket profile surrounding the internal spring-loaded square drive connection port.
Overview of the Klein Tools 66009 4-in-1 quad impact socket alongside its 1/2 to 3/8-inch drive extension adapter.
Gloved worker selecting a Klein 66009 4-in-1 flip quad socket stored on a bucket truck organizer rack for overhead utility line work.
Lineman in high-voltage safety gloves holding a cordless impact driver fitted with a Klein 1/2 to 3/8-inch adapter beside a quad socket.
Gloved technician carrying a cordless impact driver fitted with a Klein 66009 quad flip socket for quick overhead fastener installation.
Klein 4-in-1 quad impact socket and drive extension adapter displayed on a workbench beside a cordless impact wrench and work gloves.
Klein 66009 4-in-1 flip quad socket displaying 1/2, 5/8, 3/4, and 9/16-inch sizes beside its 1/2 to 3/8-inch square drive adapter.
Diagram detailing the 4-in-1 quad socket mechanism, corrosion-resistant black coating, impact rating, and color-coded identification rings.
Technical infographic illustrating 4 hex socket sizes and 1/2-inch to 3/8-inch square drive adapter conversion capability.
Vertical view of the Klein 66009 flip quad socket mounted on its nested 1/2-inch square drive impact adapter.
Reversible Klein 4-in-1 quad impact socket separated from its 3/8-inch male square drive extension adapter.
End-view perspective of the 12-point socket geometry showing the internal spring-loaded coaxial sleeve mechanism.
Top-down view inside the 12-point dual-ended flip socket highlighting the coaxial spring-loaded 1/2 and 5/8-inch drive profiles.
Side view of the Klein 66009 flip quad socket highlighting laser-etched SAE size callouts and high-visibility color bands.
Direct top-down view showing the 12-point socket profile surrounding the internal spring-loaded square drive connection port.
Overview of the Klein Tools 66009 4-in-1 quad impact socket alongside its 1/2 to 3/8-inch drive extension adapter.
Gloved worker selecting a Klein 66009 4-in-1 flip quad socket stored on a bucket truck organizer rack for overhead utility line work.
Lineman in high-voltage safety gloves holding a cordless impact driver fitted with a Klein 1/2 to 3/8-inch adapter beside a quad socket.
Gloved technician carrying a cordless impact driver fitted with a Klein 66009 quad flip socket for quick overhead fastener installation.
Klein 4-in-1 quad impact socket and drive extension adapter displayed on a workbench beside a cordless impact wrench and work gloves.
KLEIN TOOLS

Klein Tools Impact Flip Quad Socket 66009 4 in 1 SAE 12 Point (1/2 Square Drive Carbon Steel Spring Loaded Utility Hardware Installation Tool)

Only 2 left
SKU: 66009
$79.57 USD

Description

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Klein Tools 66009 4-in-1 Coaxial Spring-Loaded Flip Quad Impact Socket Set

The Klein Tools 66009 4-in-1 Flip Quad Impact Socket consolidates four essential SAE hex sizes into a single dual-ended tool and includes a nested drive adapter for utility hardware installation. Engineered from heavy-duty carbon steel with a rust-resistant black manganese phosphate finish on the adapter, this 8.64 oz ASME B107.110 compliant tool features two coaxial spring-loaded sockets that compress automatically for hands-free size changes. Built with a high-torque 12-point design for fast positioning on both square and hex fasteners, this deep-well socket operates on 1/2-inch square drive power impact wrenches or adapts down to 3/8-inch drive, allowing electrical line workers and steel contractors to seamlessly drive 1/2-inch, 9/16-inch, 5/8-inch, and 3/4-inch hardware without constantly changing tools.

Best Used For:

  • Pole Hardware & Utility Line Bolting: Rapidly driving cross-arm bolts, pole bands, and heavy utility hardware across four core SAE sizes without detaching the socket from the impact wrench anvil.
  • Square & Hex Fastener Installation: Effortlessly engaging both 4-point square nuts and 6-point hex bolt heads using precision 12-point socket geometry.
  • Dual-Drive Impact Wrench Adaptation: Operating directly on standard 1/2-inch square drive anvils or converting to 3/8-inch square drive setups via the included nested adapter.

Key Performance & Safety Features

  • 4-in-1 Coaxial Flip Quad System: Combines 1/2-inch, 9/16-inch, 5/8-inch, and 3/4-inch SAE sizes into one compact, reversible socket body.
  • Hands-Free Spring-Loaded Action: Coaxial inner sockets automatically compress under forward pressure, giving instant access to larger drive sizes without stopping for manual adjustments.
  • 12-Point High-Torque Socket Profile: Provides double the positioning angles of standard 6-point sockets for easier alignment on hex and square fasteners in cramped work spaces.
  • Heavy-Duty Carbon Steel Metallurgy: Impact-rated construction engineered to absorb extreme rotational torque and shock loads from commercial power tools.
  • Nested 1/2-Inch to 3/8-Inch Adapter: Included drive adapter features a black manganese phosphate coating for superior rust and corrosion resistance on the jobsite.
  • High-Visibility Color-Coded Bands: Distinctive colored identification rings permit rapid size verification inside dark tool bags or utility truck bins.

What's Included

  • (1) Klein Tools 4-in-1 Coaxial Spring-Loaded 12-Point Flip Quad Impact Socket (1/2", 9/16", 5/8", 3/4")
  • (1) 1/2-Inch Female to 3/8-Inch Male Square Drive Adapter

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 66009
Tool Classification System 4-in-1 Coaxial Spring-Loaded Flip Quad Impact Socket
Core Metallurgy Material High-Strength Impact-Rated Carbon Steel
Adapter Protective Finish Black Manganese Phosphate Corrosion-Resistant Finish
Primary Input Drive Interface 1/2 inch Square Drive (3/8 inch Drive via Included Adapter)
Integrated SAE Socket Sizes 1/2 inch, 9/16 inch, 5/8 inch, and 3/4 inch Hex & Square
Socket Geometry & Points 12-Point Deep Well Geometry
Socket Depth Specifications Outer: 0.78 inches (2.0 cm); Inner: 1.10 inches (2.8 cm)
Manufacturing Quality Standards ASME B107.110 Compliant
Fastener Size Transition Action Hands-Free Coaxial Spring-Loaded Compression & Reversible Flip Body
Overall Unit Dimensions 1.08 inches L x 1.08 inches W x 4.0 inches H (2.7 x 2.7 x 10.2 cm)
High-Voltage Insulated Frame No (Uninsulated - do not use on energized electrical circuits)
Total Piece Count 2 Pieces (1 Quad Socket + 1 Adapter)
Net Product Weight 8.64 oz / 0.54 lb (245 g)
Global Trade Item Number GTIN 00092644652431

Pro-Tip: When fastening smaller 1/2-inch or 5/8-inch nuts, push forward firmly to depress the coaxial spring mechanism. The outer socket sleeve will stay retracted above the fastener while the inner 12-point socket seats completely over the bolt head, enabling fast hands-free size changes without removing the socket from your impact wrench drive.