Klein 66080 dual-ended flip socket and 1/2-inch drive adapter laid out to show the 13/16-inch penta and 3/4-inch hex openings.
Diagram detailing the 1/2-inch square drive conversion, ball detent retention, and 13/16-inch penta to 3/4-inch hex flip mechanism.
Klein 66080 2-in-1 flip socket mounted on its 1/2-inch square drive adapter displaying laser-etched size callouts and color rings.
Direct end view showing the 6-point 3/4-inch hex opening and internal square drive pass-through profile of the Klein flip socket.
Direct end view highlighting the 5-point 13/16-inch penta socket face engineered for underground utility cabinet security bolts.
Klein 66080 flip socket reversed on its 1/2-inch drive extension adapter to engage 3/4-inch hex lag bolts.
Electrician holding a cordless impact wrench while reversing the Klein 66080 flip socket on its 1/2-inch drive adapter.
Utility technician standing at an outdoor transformer cabinet holding a Klein impact wrench equipped with the 66080 socket.
Utility worker holding a cordless impact wrench fitted with the Klein 66080 penta and hex flip socket ready for cabinet bolting.
Lineman making final adjustments to the Klein 66080 2-in-1 flip impact socket mounted on a 1/2-inch impact wrench.
Utility worker checking the Klein 66080 flip socket size orientation on a 1/2-inch impact wrench before opening a pad-mounted electrical enclosure.
Utility technician using the 13/16-inch penta end of a Klein 66080 flip socket on a 1/2-inch impact wrench to open a transformer door latch bolt.
Penta Hex Flip Socket with Adapter (66080) promotional video
Klein 66080 dual-ended flip socket and 1/2-inch drive adapter laid out to show the 13/16-inch penta and 3/4-inch hex openings.
Diagram detailing the 1/2-inch square drive conversion, ball detent retention, and 13/16-inch penta to 3/4-inch hex flip mechanism.
Klein 66080 2-in-1 flip socket mounted on its 1/2-inch square drive adapter displaying laser-etched size callouts and color rings.
Direct end view showing the 6-point 3/4-inch hex opening and internal square drive pass-through profile of the Klein flip socket.
Direct end view highlighting the 5-point 13/16-inch penta socket face engineered for underground utility cabinet security bolts.
Klein 66080 flip socket reversed on its 1/2-inch drive extension adapter to engage 3/4-inch hex lag bolts.
Electrician holding a cordless impact wrench while reversing the Klein 66080 flip socket on its 1/2-inch drive adapter.
Utility technician standing at an outdoor transformer cabinet holding a Klein impact wrench equipped with the 66080 socket.
Utility worker holding a cordless impact wrench fitted with the Klein 66080 penta and hex flip socket ready for cabinet bolting.
Lineman making final adjustments to the Klein 66080 2-in-1 flip impact socket mounted on a 1/2-inch impact wrench.
Utility worker checking the Klein 66080 flip socket size orientation on a 1/2-inch impact wrench before opening a pad-mounted electrical enclosure.
Utility technician using the 13/16-inch penta end of a Klein 66080 flip socket on a 1/2-inch impact wrench to open a transformer door latch bolt.
Penta Hex Flip Socket with Adapter (66080) promotional video
KLEIN TOOLS

Klein Tools Flip Impact Socket 66080 13/16 Penta 3/4 Inch Hex (1/2 Square Drive Adapter 4140 Steel 6 Point Underground Utility Bolting)

Only 2 left
SKU: 66080
$54.96 USD

Description

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Klein Tools 66080 2-in-1 13/16-Inch Penta and 3/4-Inch Hex Flip Impact Socket Set

The Klein Tools 66080 2-in-1 Penta/Hex Flip Impact Socket with Adapter serves as a dual-sided power driving head engineered to service underground distribution hardware and security enclosures using 1/2 inch square drive impact wrenches. Forged from high-strength 4140 tool steel with an S2 steel adapter shank featuring a black manganese phosphate corrosion finish, this 12-2/5 oz (12.4 oz) deep-well socket assembly measures 4-18/25 inches (4.72 inches) in overall height by 1-23/100 inches (1.23 inches) in outer diameter. Designed to meet ASME B107.17M and B107.4 standards while enduring extreme rotational impact forces, this multi-head tool allows utility linemen, electrical contractors, and municipal workers to instantly reverse between 5-point 13/16 inch penta security bolts and 6-point 3/4 inch hex lag bolts without switching power tool attachments.

Best Used For:

  • Underground Utility Enclosure Servicing: Removing 5-point 13/16 inch tamper-resistant pentagonal security bolts on pad-mounted transformers and secondary junction boxes.
  • Pole-Line & Overhead Hardware Installation: Driving 6-point 3/4 inch heavy hex nuts and crossarm lag bolts using 1/2 inch drive cordless impact wrenches.
  • High-Torque Power Wrench Conversion: Adapting standard 1/2 inch square impact anvils (such as the Klein BAT20CW1) for instant reversible socket flipping under continuous jobsite vibration.

Key Performance & Safety Features

  • 2-in-1 Reversible Flip Design: Dual-ended deep-well sleeve quickly slides off the drive adapter and flips to switch between 13/16 inch penta and 3/4 inch hex heads.
  • 5-Point & 6-Point Precision Geometries: Integrates a 5-point pentagonal socket head for tamperproof utility enclosure bolts and a 6-point socket face for standard hex nuts.
  • Black Manganese Phosphate Coating: Industrial protective surface treatment shields steel surfaces from moisture oxidation, rust, and abrasion wear.
  • High-Tension Steel Ball Detent: Spring-loaded detent ball secures the flip socket onto the 1/2 to 1/2 inch square adapter anvil to prevent socket drop-off.
  • ASME Certified Impact Construction: Heat-treated 4140 and S2 alloy steel metallurgy complies with ASME B107.17M and B107.4 standards for high-impact power driving.
  • Color-Coded Visual Identification: Distinctive size band allows rapid visual identification of socket dimensions inside dark tool bags or utility truck bins.

What's Included

  • (1) Klein Tools 13/16-Inch Penta to 3/4-Inch Hex Dual-Sided Flip Impact Socket (Cat. No. 66081)
  • (1) 1/2-Inch Square to 1/2-Inch Square Drive Impact Adapter with Ball Detent (Cat. No. 66078)

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 66080
Tool Classification Type 2-in-1 Penta/Hex Flip Impact Socket with Adapter
Primary Drive Interface Size 1/2 inch Male Square Drive Anvil
Included Socket Sizes 13/16 inch Pentagonal (5-Point) & 3/4 inch Hexagonal (6-Point)
Socket Point Profile Geometries 5-Point Penta (Security) / 6-Point Hex
Socket Body Metallurgy Forged Heat-Treated 4140 Alloy Steel (66081)
Adapter Metallurgy Material High-Impact Rated S2 Tool Steel (X66078)
Surface Protective Finish Black Manganese Phosphate Corrosion-Resistant Finish
Socket Retention Mechanism Spring-Loaded Stainless Steel Ball Detent
Manufacturing Quality Standards ASME B107.17M / ASME B107.4 Compliant
Power Driver Tool Compatibility 1/2 inch Impact Wrenches (e.g. Klein BAT20CW / BAT20CW1)
Overall Unit Height 4-18/25 inches / 4.72 inches (12.0 cm)
Overall Outer Width & Length 1-23/100 inches / 1.23 inches (3.1 cm x 3.1 cm)
High-Voltage Insulated Frame No (Uninsulated - do not use on energized electrical circuits)
Total Piece Count 2 Pieces (Flip Socket + Drive Adapter)
Assembled Net Package Weight 12-2/5 oz / 12.4 oz (352 g)
Global Trade Item Number GTIN 00092644382147

Pro-Tip: When servicing underground transformer cabinets, clear dirt and debris out of the 5-point pentagonal bolt head before seating the 13/16 inch penta socket. Full engagement over the pentagonal flats prevents corner rounding and ensures proper torque transfer when loosening stubborn security hardware.