Klein Tools 66044 3-in-1 flip impact socket with side slot beside its 1/2-inch to 3/8-inch square drive adapter for utility hardware.
Diagram detailing 9/16 and 3/4-inch hex flip socket features, 1/2-inch to 3/8-inch drive conversion, ball detent retention, and side slot.
Close-up of the 3/4-inch drive end showing the side slot designed to pass over curved utility pole eyebolts and long hardware shanks.
Reversible Klein 66044 flip socket mounted on a square drive adapter displaying color-coded bands for fast size identification.
Klein 1/2-inch female to 3/8-inch male square drive adapter with ball detent mechanism engineered for high-torque impact wrench use.
Perspective view of the Klein 3-in-1 impact flip socket set showing 9/16-inch and 3/4-inch drive ends beside a square driver adapter.
Lineman aligning the side slot of a 66044 impact socket over a curved eyebolt on a wooden power pole to demonstrate thread clearance.
Utility worker using the 66044 flip socket on a power impact wrench to secure mounting brackets on an overhead cross-arm assembly.
Electric utility technician driving structural hardware underneath a timber cross-arm using a Klein 3-in-1 slotted impact socket.
Lineman in high-voltage leather protective gloves reconfiguring the reversible 66044 flip socket on an impact driver shaft.
Lineman in insulated safety gloves connecting the 1/2 to 3/8-inch drive adapter into the Klein 66044 slotted flip socket.
Utility technician aligning the side slot of a Klein 66044 socket over an overhead hot-line clamp loop on a power pole.
Klein 66044 3-in-1 flip socket and square drive adapter sitting on a workbench next to a 1/2-inch impact wrench and gloves.
Klein Tools 66044 3-in-1 flip impact socket with side slot beside its 1/2-inch to 3/8-inch square drive adapter for utility hardware.
Diagram detailing 9/16 and 3/4-inch hex flip socket features, 1/2-inch to 3/8-inch drive conversion, ball detent retention, and side slot.
Close-up of the 3/4-inch drive end showing the side slot designed to pass over curved utility pole eyebolts and long hardware shanks.
Reversible Klein 66044 flip socket mounted on a square drive adapter displaying color-coded bands for fast size identification.
Klein 1/2-inch female to 3/8-inch male square drive adapter with ball detent mechanism engineered for high-torque impact wrench use.
Perspective view of the Klein 3-in-1 impact flip socket set showing 9/16-inch and 3/4-inch drive ends beside a square driver adapter.
Lineman aligning the side slot of a 66044 impact socket over a curved eyebolt on a wooden power pole to demonstrate thread clearance.
Utility worker using the 66044 flip socket on a power impact wrench to secure mounting brackets on an overhead cross-arm assembly.
Electric utility technician driving structural hardware underneath a timber cross-arm using a Klein 3-in-1 slotted impact socket.
Lineman in high-voltage leather protective gloves reconfiguring the reversible 66044 flip socket on an impact driver shaft.
Lineman in insulated safety gloves connecting the 1/2 to 3/8-inch drive adapter into the Klein 66044 slotted flip socket.
Utility technician aligning the side slot of a Klein 66044 socket over an overhead hot-line clamp loop on a power pole.
Klein 66044 3-in-1 flip socket and square drive adapter sitting on a workbench next to a 1/2-inch impact wrench and gloves.
KLEIN TOOLS

Klein Tools Slotted Impact Flip Socket 66044 3 in 1 SAE 12 Point (1/2 Square Drive Steel Eyebolt Hardware Fastening Adapter)

Only 2 left
SKU: 66044
$40.75 USD

Description

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Klein Tools 66044 3-in-1 Slotted Reversible 12-Point Impact Flip Socket

The Klein Tools 66044 3-in-1 Flip Impact Socket integrates 9/16-inch and 3/4-inch hex dimensions into a single dual-ended socket body paired with a 1/2-inch to 3/8-inch square drive adapter for specialized utility line work. Forged from high-torque impact-grade steel with a black manganese phosphate protective surface finish, this 10.24 oz (0.64 lb) ASME B107.110 compliant tool features an integrated side alignment slot specifically engineered to clear and turn eyelet hardware, bent J-bolts, and pole steps. Built for linemen, utility contractors, and steel tower erectors, the reversible 12-point socket geometry delivers multi-angle positioning over both square fasteners and hex nuts without requiring multiple socket changes during overhead installation.

Best Used For:

  • Slotted Utility Eyelet & J-Bolt Fastening: Turning curved lag hooks, eye bolts, and pole steps using the integrated side alignment clearance slot.
  • Square & Hex Nut Installation: Positioning smoothly over 4-point square hardware and 6-point hex bolts using versatile 12-point socket geometry.
  • Power Impact Wrench Conversion: Operating on standard 1/2-inch square drive impact wrenches or utilizing the included 1/2-inch to 3/8-inch adapter.

Key Performance & Safety Features

  • 3-in-1 Reversible Slotted Socket Body: Combines 9/16-inch hex, 3/4-inch hex, and an eyelet hardware slot into a single compact tool.
  • Integrated Hardware Alignment Slot: Side slot allows the socket body to slip over curved eyelets, hook shanks, and extended threads.
  • High-Torque 12-Point Profile: Eases fastener engagement and enables rapid alignment on square utility nuts and hex hardware.
  • Black Manganese Phosphate Finish: Corrosion-resistant industrial coating protects steel components from moisture and rust.
  • Cross-Hole Safety Retention Lock: Transverse pin hole prevents accidental socket separation from impact wrench anvils under heavy vibration.
  • Color-Coded Identification Rings: Single visual band indicates standard socket end while double band marks the slotted hardware side.

What's Included

  • (1) Klein Tools 66044 3-in-1 Slotted Reversible 12-Point Flip Impact Socket (9/16" x 3/4")
  • (1) 1/2-Inch to 3/8-Inch Square Drive Adapter

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 66044
Tool Classification System 3-in-1 Slotted Reversible Impact Flip Socket
Core Metallurgy Material Heat-Treated Forged Impact Steel
Surface Protective Finish Black Manganese Phosphate Corrosion-Resistant Finish
Primary Input Drive Interface 1/2 inch Square Drive (Includes 1/2" to 3/8" Drive Adapter)
Integrated SAE Socket Sizes 9/16 inch and 3/4 inch Hex
Socket Point Profile Geometry 12-Point Deep Well Profile
Fastener Safety Retention Cross-Hole Pin Alignment Detent Retention
Manufacturing Quality Standards ASME B107.110 Compliant
Visual Identification System Single & Double Color-Coded Identification Rings
Overall Unit Dimensions 4.2 inches L x 1.2 inches W x 1.2 inches H (10.7 x 3.0 x 3.0 cm)
High-Voltage Insulated Frame No (Uninsulated - do not use on energized electrical circuits)
Total Piece Count 2 Pieces (1 Reversible Socket + 1 Square Adapter)
Net Product Weight 10.24 oz / 0.64 lb (290 g)
Global Trade Item Number GTIN 00092644380211

Pro-Tip: When installing eyelet hardware or curved pole steps, slide the double-banded side slot directly over the loop before driving. This prevents binding on extended curved shafts and maintains full surface drive contact with the base nut.