Open heavy-duty storage case displaying six Klein 2-in-1 coaxial spring-loaded sockets covering 12 SAE sizes for utility hardware.
Diagram highlighting 12 SAE sizes in 6 sockets, side alignment slots for utility pole hardware, and color-coded identification rings.
Top-down view of the Klein 66090 kit in its molded storage case displaying laser-etched sizes from 3/8-inch up to 1-1/8-inch.
Close-up of the Klein 1-1/8 by 15/16-inch 12-point socket highlighting its side slot designed to clear long utility pole hardware.
Direct top-down perspective showing the 12-point socket opening and internal spring-loaded coaxial sleeve for hands-free size changes.
Utility lineman using a slotted socket on a cordless impact wrench to turn a curved eyebolt on a wooden utility pole.
Electrician tightening a long utility pole eyebolt using a Klein side-slotted coaxial impact socket mounted on a cordless driver.
Line worker aligning a Klein side-slotted impact socket over a long utility pole J-bolt to demonstrate extended thread clearance.
Klein 66090 6-piece slotted socket set organized in its hard-shell storage case resting on a jobsite workbench next to an impact driver.
Technician carrying a 1/2-inch impact wrench equipped with a Klein 1-1/8 by 15/16-inch slotted coaxial socket for overhead utility work.
Klein 66090 socket set arranged on a jobsite shelf beside a 1/2-inch impact wrench to organize tools for power utility pole maintenance.
Lineman attaching a 1-1/8 by 15/16-inch slotted impact socket onto a 1/2-inch square drive cordless wrench for pole hardware jobs.
Open storage case organizing six Klein coaxial sockets covering 12 SAE sizes from 3/8 to 1-1/8 inch for utility hardware installation.
3-in-1 Slotted Impact Socket (Cat. No. 66031) promotional video
Open heavy-duty storage case displaying six Klein 2-in-1 coaxial spring-loaded sockets covering 12 SAE sizes for utility hardware.
Diagram highlighting 12 SAE sizes in 6 sockets, side alignment slots for utility pole hardware, and color-coded identification rings.
Top-down view of the Klein 66090 kit in its molded storage case displaying laser-etched sizes from 3/8-inch up to 1-1/8-inch.
Close-up of the Klein 1-1/8 by 15/16-inch 12-point socket highlighting its side slot designed to clear long utility pole hardware.
Direct top-down perspective showing the 12-point socket opening and internal spring-loaded coaxial sleeve for hands-free size changes.
Utility lineman using a slotted socket on a cordless impact wrench to turn a curved eyebolt on a wooden utility pole.
Electrician tightening a long utility pole eyebolt using a Klein side-slotted coaxial impact socket mounted on a cordless driver.
Line worker aligning a Klein side-slotted impact socket over a long utility pole J-bolt to demonstrate extended thread clearance.
Klein 66090 6-piece slotted socket set organized in its hard-shell storage case resting on a jobsite workbench next to an impact driver.
Technician carrying a 1/2-inch impact wrench equipped with a Klein 1-1/8 by 15/16-inch slotted coaxial socket for overhead utility work.
Klein 66090 socket set arranged on a jobsite shelf beside a 1/2-inch impact wrench to organize tools for power utility pole maintenance.
Lineman attaching a 1-1/8 by 15/16-inch slotted impact socket onto a 1/2-inch square drive cordless wrench for pole hardware jobs.
Open storage case organizing six Klein coaxial sockets covering 12 SAE sizes from 3/8 to 1-1/8 inch for utility hardware installation.
3-in-1 Slotted Impact Socket (Cat. No. 66031) promotional video
KLEIN TOOLS

Klein Tools Slotted Impact Socket Set 66090 6 Piece 12 Sizes (1/2 Square Drive 4140 Steel 12 Point Pole Hardware Installation Kit)

Only 2 left
SKU: 66090
$229.99 USD

Description

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Klein Tools 66090 6-Piece 2-in-1 Slotted Coaxial Spring-Loaded 12-Point Impact Socket Set

The Klein Tools 66090 6-Piece 2-in-1 Slotted Impact Socket Set integrates twelve primary SAE sizes across six coaxial spring-loaded sockets for specialized utility pole hardware maintenance. Forged from high-strength 4140 alloy steel, this ASME B107.2 compliant set features two specialized slotted sockets (1-1/8 x 15/16-inch and 3/4 x 9/16-inch) equipped with alignment slots to tighten or loosen bent utility hardware and pole studs. Designed for electrical line workers, utility contractors, and steel tower erectors, the hands-free spring-loaded socket mechanism lets operators press inner socket sleeves directly over fasteners to instantly switch drive dimensions across twelve core sizes ranging from 3/8 inch to 1-1/8 inches without removing sockets from 1/2-inch square drive impact wrenches.

Best Used For:

  • Slotted Utility Pole Hardware Maintenance: Tightening and backing off bent J-bolts, pole steps, and curved lag fasteners using specialized 1-1/8 x 15/16-inch and 3/4 x 9/16-inch side-slotted socket channels.
  • Square & Hex Fastener Engagement: Positioning smoothly over both 4-point square hardware and 6-point hex bolts using precision 12-point socket profiles.
  • High-Torque Power Impact Driving: Mounting directly onto standard 1/2-inch square drive impact wrenches (such as the Klein BAT20CW1) for continuous overhead line work.

Key Performance & Safety Features

  • Integrated Pole Hardware Alignment Slots: Two sockets feature engineered side slots to clear extended threaded rods, eyebolts, and curved pole hardware.
  • Hands-Free Coaxial Spring-Loaded Action: Internal spring-loaded socket sleeve automatically retracts under pressure, granting instant 2-in-1 capability on single drive heads.
  • 12 SAE Sizes Consolidated in 6 Sockets: Combines 1-1/8 x 15/16'', 1 x 13/16'', 7/8 x 11/16'', 3/4 x 9/16'', 5/8 x 7/16'', and 1/2 x 3/8'' dimensions into six compact socket bodies.
  • 12-Point High-Torque Socket Geometry: Delivers flexible positioning angles for easy alignment on square fasteners and hex bolt heads in cramped clearance areas.
  • Forged 4140 Alloy Steel Metallurgy: Heat-treated impact-grade alloy steel construction complies with ASME B107.2 to withstand intense rotational torque.
  • Cross-Hole Detent Alignment Lock: Transverse cross-hole pin retainer prevents unintentional socket detachment from power tool anvils during heavy vibration.

What's Included

  • (1) 1-1/8-Inch x 15/16-Inch Slotted Coaxial Spring-Loaded 12-Point Impact Socket
  • (1) 1-Inch x 13/16-Inch Coaxial Spring-Loaded 12-Point Impact Socket
  • (1) 7/8-Inch x 11/16-Inch Coaxial Spring-Loaded 12-Point Impact Socket
  • (1) 3/4-Inch x 9/16-Inch Slotted Coaxial Spring-Loaded 12-Point Impact Socket
  • (1) 5/8-Inch x 7/16-Inch Coaxial Spring-Loaded 12-Point Impact Socket
  • (1) 1/2-Inch x 3/8-Inch Coaxial Spring-Loaded 12-Point Impact Socket
  • (1) Hard-Shell Storage Carrying Case

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 66090
Tool Classification System 6-Piece 2-in-1 Slotted Coaxial Spring-Loaded Impact Socket Set
Core Metallurgy Material Forged Heat-Treated 4140 Alloy Steel
Primary Input Drive Interface 1/2 inch Female Square Drive
Integrated Socket Sizes (SAE) 1-1/8x15/16'', 1x13/16'', 7/8x11/16'', 3/4x9/16'', 5/8x7/16'', 1/2x3/8''
Specialized Feature Capabilities Side Alignment Slots on 1-1/8x15/16'' and 3/4x9/16'' Sockets
Socket Point Profile Geometry 12-Point Deep Well Profile
Fastener Safety Retention Cross-Hole Pin Detent Retention Alignment
Manufacturing Quality Standards ASME B107.2 Compliant
Power Driver Tool Compatibility 1/2 inch Square Drive Impact Wrenches (Klein BAT20CW1)
Overall Carrying Case Dimensions 4.4 inches L x 2.3 inches W x 8.8 inches H (11.2 x 5.8 x 22.4 cm)
High-Voltage Insulated Frame No (Uninsulated - do not use on energized electrical circuits)
Total Piece Count 6 Pieces (6 Coaxial Sockets + Carrying Case)
Global Trade Item Number GTIN 00092644651793

Pro-Tip: When servicing long utility pole hardware or curved studs, align the socket's side slot over the extended bolt shank before engaging power. The alignment channel lets the socket slide completely over long threads to seat directly on the nut without binding.