Klein 6512QS Quad-4 SAE impact flip socket set displaying 1/2, 5/8, 11/16, and 9/16-inch sizes on a 6.5-inch drive extension shaft.
Diagram detailing 4 SAE sizes in 1 socket body, color-coded bands, deep-well design, and impact-rated alloy steel construction.
Diagram demonstrating spring-loaded coaxial action where applying pressure retracts inner sleeve walls to engage larger imperial hex heads.
Overview of included components showing the Klein Quad-4 SAE flip socket alongside its 6.5-inch impact extension adapter shank.
Klein 6512QS Quad-4 SAE flip socket mounted on a power impact driver chuck to highlight high-torque impact compatibility.
How A Quad Socket Works (651QS, 652QS, 653QS, 654QS and 656QS) promotional video
Klein 6512QS Quad-4 SAE impact flip socket set displaying 1/2, 5/8, 11/16, and 9/16-inch sizes on a 6.5-inch drive extension shaft.
Diagram detailing 4 SAE sizes in 1 socket body, color-coded bands, deep-well design, and impact-rated alloy steel construction.
Diagram demonstrating spring-loaded coaxial action where applying pressure retracts inner sleeve walls to engage larger imperial hex heads.
Overview of included components showing the Klein Quad-4 SAE flip socket alongside its 6.5-inch impact extension adapter shank.
Klein 6512QS Quad-4 SAE flip socket mounted on a power impact driver chuck to highlight high-torque impact compatibility.
How A Quad Socket Works (651QS, 652QS, 653QS, 654QS and 656QS) promotional video
KLEIN TOOLS

Klein Tools SAE Impact Flip Socket Set 6512QS 2 Piece Quad 4 (1/4 Inch Drive 4 in 1 Imperial Spring Loaded Steel Hex Fastening Adapter)

Only 2 left
SKU: 6512QS
$19.99 USD

Description

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Klein Tools 6512QS Quad-4 SAE 4-in-1 Coaxial Heavy-Duty Impact Flip Socket Set

The Klein Tools 6512QS Quad-4 SAE Impact Flip Socket Set combines four essential imperial hex dimensions into a single dual-ended socket body paired with a 6-1/2-inch storage drive shaft extension. Forged from heat-treated cold-forged steel with a black manganese phosphate protective surface finish, this 6.8 oz (0.43 lb) impact-rated assembly measures 7.1 inches high by 0.96 inches wide and incorporates internal spring-loaded coaxial socket sleeves across 1/2-inch, 9/16-inch, 5/8-inch, and 11/16-inch hex sizes. Engineered to endure high rotational torque and severe vibration from power impact drivers, this system allows commercial electricians, steel erectors, and HVAC contractors to compress internal socket walls directly over bolt heads for immediate hands-free size switching without removing the tool from long threaded studs or tight electrical enclosures.

Best Used For:

  • Imperial Structural & Frame Bolting: Servicing industrial machinery mounts, strut channel assemblies, and electrical frames requiring 1/2-inch, 9/16-inch, 5/8-inch, and 11/16-inch hex hardware without swapping individual socket units.
  • Extended Threaded Stud Fastening: Reaching recessed nuts buried deep along threaded rod installations utilizing a deep-well coaxial socket profile.
  • Impact Driver & Shaft Extension Integration: Operating directly on standard 1/4-inch quick-connect impact drivers or 1/4-inch drive extension shafts for rapid high-torque power driving.

Key Performance & Safety Features

  • 4-in-1 Quad-4 Coaxial SAE Socket: Houses 1/2-inch, 9/16-inch, 5/8-inch, and 11/16-inch imperial hex sizes within a single dual-ended reversible socket body.
  • Hands-Free Spring-Loaded Action: Coaxial inner sleeve retracts automatically under forward pressure, granting instant access to larger hex dimensions without stopping for manual adjustments.
  • Heat-Treated Cold-Forged Steel Metallurgy: Heavy-duty impact-rated construction absorbs high rotational torque shock loads without cracking drive walls or stripping fastener flats.
  • Black Manganese Phosphate Protective Coating: Industrial surface protective finish prevents corrosion, rust, and abrasion under harsh jobsite conditions.
  • Industry-Standard Color-Coded Bands: Vibrant painted identification rings permit rapid visual size recognition inside dark work areas or cluttered tool pouches.
  • 6-1/2-Inch Storage Extension Shaft: Extended 1/4-inch drive adapter shaft holds the quad socket securely while providing extra reach inside confined spaces.

What's Included

  • (1) Klein Tools Quad-4 Coaxial Reversible 4-in-1 Heavy-Duty SAE Impact Flip Socket (1/2", 9/16", 5/8", 11/16")
  • (1) 6-1/2-Inch Extended 1/4-Inch Drive Storage Extension Shaft

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 6512QS
Tool Classification System Quad-4 4-in-1 Coaxial SAE Impact Flip Socket Set
Core Metallurgy Material Heat-Treated Cold-Forged Steel
Surface Protective Finish Black Manganese Phosphate Corrosion-Resistant Finish
Primary Input Drive Interface 1/4 inch Drive (Includes 6-1/2 inch Shaft Adapter)
Integrated SAE Socket Sizes 1/2 inch, 9/16 inch, 5/8 inch, and 11/16 inch Hex
Socket Point Profile Geometry 6-Point Deep Well Profile
Fastener Transition Action Hands-Free Coaxial Spring-Loaded Compression & Reversible Flip Body
Visual Identification System Color-Coded Painted Rings
Overall Unit Height 7.1 inches (18.0 cm)
Overall Unit Width & Length 0.96 inches W x 0.96 inches L (2.4 cm x 2.4 cm)
High-Voltage Insulated Frame No (Uninsulated - do not use on energized electrical circuits)
Total Piece Count 2 Pieces (1 Quad Socket + 1 Extension Shaft)
Net Product Weight 6.8 oz / 0.43 lb (193 g)
Global Trade Item Number GTIN 00092644380129

Pro-Tip: To drive 1/2-inch or 5/8-inch hex bolts, apply firm forward pressure against the fastener head so the internal coaxial spring compresses. To engage 9/16-inch or 11/16-inch hardware, ease forward pressure or reverse the socket on the 6-1/2-inch extension shank to utilize the outer socket wall profile directly.