Open molded storage case organizing the Klein 66050E 5-piece impact set with four coaxial spring-loaded sockets and a 1/4-inch hex adapter.
Diagram detailing 8 metric socket sizes in 4 coaxial bodies, 12-point design, and 1/4-inch hex to 1/2-inch square drive conversion capability.
Four 12-point coaxial metric impact sockets and drive adapter lined up to display laser-etched metric size markings and color-coded identification bands.
Open molded storage case resting behind four coaxial metric impact sockets and a 1/4-inch hex to 1/2-inch square drive adapter.
Close-up perspective of the Klein 24mm by 19mm coaxial spring-loaded 12-point impact socket showing its internal sleeve mechanism.
Worker holding a cordless impact driver fitted with a Klein 32mm by 27mm coaxial socket to demonstrate elevated overhead fastening.
Gloved contractor carrying a 1/2-inch impact driver fitted with a Klein coaxial metric socket for transport around a jobsite.
Technician using a Klein coaxial 12-point socket on an impact driver to secure metal conduit support hardware on a jobsite floor.
Maintenance worker operating a 1/2-inch impact wrench fitted with a Klein coaxial metric socket to tighten industrial equipment frame bolts.
Ironworker in a hardhat using a Klein 24mm by 19mm coaxial impact socket on a power driver to secure structural column mounting plates.
Industrial technician using a Klein coaxial metric socket on an impact driver to tighten engine housing bolts in tight spaces.
2-in-1 Impact Socket Sets (Cat. No 66040/66050E) Promotional video
Open molded storage case organizing the Klein 66050E 5-piece impact set with four coaxial spring-loaded sockets and a 1/4-inch hex adapter.
Diagram detailing 8 metric socket sizes in 4 coaxial bodies, 12-point design, and 1/4-inch hex to 1/2-inch square drive conversion capability.
Four 12-point coaxial metric impact sockets and drive adapter lined up to display laser-etched metric size markings and color-coded identification bands.
Open molded storage case resting behind four coaxial metric impact sockets and a 1/4-inch hex to 1/2-inch square drive adapter.
Close-up perspective of the Klein 24mm by 19mm coaxial spring-loaded 12-point impact socket showing its internal sleeve mechanism.
Worker holding a cordless impact driver fitted with a Klein 32mm by 27mm coaxial socket to demonstrate elevated overhead fastening.
Gloved contractor carrying a 1/2-inch impact driver fitted with a Klein coaxial metric socket for transport around a jobsite.
Technician using a Klein coaxial 12-point socket on an impact driver to secure metal conduit support hardware on a jobsite floor.
Maintenance worker operating a 1/2-inch impact wrench fitted with a Klein coaxial metric socket to tighten industrial equipment frame bolts.
Ironworker in a hardhat using a Klein 24mm by 19mm coaxial impact socket on a power driver to secure structural column mounting plates.
Industrial technician using a Klein coaxial metric socket on an impact driver to tighten engine housing bolts in tight spaces.
2-in-1 Impact Socket Sets (Cat. No 66040/66050E) Promotional video
KLEIN TOOLS

Klein Tools Coaxial Metric Impact Socket Set 66050E 5 Piece 8 Sizes (1/2 Square Drive 4140 Steel 12 Point Utility Hardware Installation Kit)

Only 2 left
SKU: 66050E
$163.09 USD

Description

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Klein Tools 66050E 5-Piece 2-in-1 Coaxial Spring-Loaded Metric Impact Socket Set

The Klein Tools 66050E 5-Piece 2-in-1 Metric Impact Socket Set houses eight primary metric dimensions across four coaxial spring-loaded sockets and a 1/4 inch hex to 1/2 inch square drive adapter for commercial hardware maintenance. Forged from heat-treated 4140 alloy steel, this 4.1 lb ASME B107.33M compliant set incorporates a 12-point socket geometry that eases alignment onto both metric hex heads and square fasteners. Engineered for power grid maintenance, utility construction, and industrial machinery assembly, the hands-free spring mechanism allows operators to depress the inner socket sleeve directly over bolt heads to instantly transition across eight core metric sizes (13mm, 17mm, 19mm, 24mm, 22mm, 30mm, 27mm, 32mm) without removing socket bodies from impact wrench anvils.

Best Used For:

  • Electric Utility Pole & Infrastructure Bolting: Driving heavy structural metric fasteners and pole line hardware across 13 mm to 32 mm dimensions without manually changing socket drive heads.
  • Square & Metric Hex Hardware Servicing: Engaging 4-point square hardware and 6-point metric hex bolts effortlessly using precision 12-point socket profiles.
  • Impact Driver & Wrench Conversion: Operating directly on 1/2 inch square drive impact wrenches or adapting 1/4 inch power hex impact driver chucks via the included adapter shank.

Key Performance & Safety Features

  • Hands-Free Coaxial Spring-Loaded Action: Inner spring-loaded socket automatically retracts under forward pressure, enabling immediate access to larger socket sizes without manual adjustments.
  • 8 Metric Sizes in 4 Compact Sockets: Combines 17 x 13 mm, 24 x 19 mm, 30 x 22 mm, and 32 x 27 mm dimensions into four single-ended socket bodies.
  • 12-Point High-Torque Socket Geometry: Delivers flexible positioning angles to easily align over both square fasteners and 6-point metric hex bolt heads.
  • Forged 4140 Alloy Steel Metallurgy: Heat-treated impact-grade construction meets ASME B107.33M standards to withstand high rotational impact torque loads.
  • Cross-Hole Detent Safety Lock: Engineered cross-hole alignment prevents accidental socket separation from drive adapters under continuous impact vibration.
  • High-Visibility Color-Coded Bands: Distinctive painted color rings allow instant visual size identification in dimly lit enclosures or utility truck beds.

What's Included

  • (1) 17 mm x 13 mm Coaxial Spring-Loaded 12-Point Metric Impact Socket
  • (1) 24 mm x 19 mm Coaxial Spring-Loaded 12-Point Metric Impact Socket
  • (1) 30 mm x 22 mm Coaxial Spring-Loaded 12-Point Metric Impact Socket
  • (1) 32 mm x 27 mm Coaxial Spring-Loaded 12-Point Metric Impact Socket
  • (1) 1/4-Inch Hex Shank to 1/2-Inch Square Drive Impact Adapter
  • (1) Hard-Shell Storage Carrying Case

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 66050E
Tool Classification System 5-Piece Coaxial Spring-Loaded 2-in-1 Metric Impact Socket Set
Core Metallurgy Material Forged Heat-Treated 4140 Alloy Steel
Input Drive Interface Sizes 1/2 inch Female Square Drive & 1/4 inch Hex Power Shank Adapter
Integrated Metric Socket Sizes 17 x 13 mm, 24 x 19 mm, 30 x 22 mm, 32 x 27 mm
Socket Point Profile Geometry 12-Point Deep Well Profile
Fastener Safety Retention Cross-Hole Adapter Retention Alignment
Manufacturing Quality Standards ASME B107.33M Compliant
Power Driver Tool Compatibility 1/2 inch Impact Wrenches (BAT20CW1) & 1/4 inch Impact Drivers
Overall Carrying Case Dimensions 9.65 inches L x 5.71 inches W x 2.85 inches H (24.5 x 14.5 x 7.2 cm)
High-Voltage Insulated Frame No (Uninsulated - do not use on energized electrical circuits)
Total Piece Count 5 Pieces (4 Sockets + 1 Adapter + Case)
Assembled Net Package Weight 4.1 lb (1.9 kg)
Global Trade Item Number GTIN 00092644650758

Pro-Tip: When working with smaller inner metric nuts, apply steady forward force against the fastener. The outer socket sleeve remains pushed back against its internal coil spring while the inner 12-point socket seats completely over the bolt head, enabling seamless hands-free operation.