Klein 6512MQS Quad-4 metric impact flip socket set displaying 9mm, 13mm, 14mm, and 11mm sizes on a 6.5-inch extension shaft.
Diagram detailing 4 metric sizes in 1 socket body, color-coded rings, deep-well profile, and impact-rated alloy steel construction.
Diagram demonstrating spring-loaded coaxial action where applying pressure retracts inner sleeve walls to engage larger metric hex heads.
Overview of included components showing the Klein Quad-4 metric flip socket alongside its 6.5-inch impact extension adapter shank.
Klein 6512MQS Quad-4 metric 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 6512MQS Quad-4 metric impact flip socket set displaying 9mm, 13mm, 14mm, and 11mm sizes on a 6.5-inch extension shaft.
Diagram detailing 4 metric sizes in 1 socket body, color-coded rings, deep-well profile, and impact-rated alloy steel construction.
Diagram demonstrating spring-loaded coaxial action where applying pressure retracts inner sleeve walls to engage larger metric hex heads.
Overview of included components showing the Klein Quad-4 metric flip socket alongside its 6.5-inch impact extension adapter shank.
Klein 6512MQS Quad-4 metric 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 Metric Impact Flip Socket Set 6512MQS 2 Piece Quad 4 (1/4 Inch Drive 4 in 1 Metric Spring Loaded Steel Hex Fastening Adapter)

Only 2 left
SKU: 6512MQS
$19.99 USD

Description

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Klein Tools 6512MQS Quad-4 Metric 4-in-1 Coaxial Heavy-Duty Impact Flip Socket Set

The Klein Tools 6512MQS Quad-4 Metric Impact Flip Socket Set integrates four core metric hex dimensions into a single dual-ended socket body paired with a 6-1/2-inch drive shaft extension. Forged from heat-treated cold-forged steel with a black manganese phosphate surface finish, this ultra-lightweight 4 oz (0.25 lb) impact-rated attachment measures 4.36 inches high by 0.77 inches wide and incorporates internal spring-loaded coaxial socket sleeves across 9 mm, 11 mm, 13 mm, and 14 mm hex sizes. Engineered to withstand high rotational torque and impact driver vibration, this drive system enables industrial technicians, commercial electricians, and equipment mechanics to depress internal socket walls directly over bolt heads for immediate hands-free size switching without detaching the assembly from extended threaded studs or cramped electrical enclosures.

Best Used For:

  • Metric Industrial & Equipment Bolting: Fastening electrical control boxes, machinery mounts, and junction boxes requiring 9 mm, 11 mm, 13 mm, and 14 mm metric hex hardware without swapping individual sockets.
  • Extended Threaded Stud Access: Driving recessed nuts positioned along extended threaded rods inside narrow mounting channels using a deep-well coaxial socket profile.
  • Power Impact Driver Integration: Attaching directly onto 1/4-inch quick-connect impact drivers or 1/4-inch drive extension shafts for fast, high-torque hardware installation.

Key Performance & Safety Features

  • 4-in-1 Quad-4 Coaxial Metric Socket: Houses 9 mm, 11 mm, 13 mm, and 14 mm metric 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 tool changes.
  • Heat-Treated Cold-Forged Steel Metallurgy: Premium impact-rated alloy steel construction absorbs high rotational torque shock loads without rounding fastener corners or cracking drive walls.
  • Black Manganese Phosphate Protective Finish: Industrial protective coating guards against corrosion, rust, and chemical abrasion under harsh jobsite conditions.
  • Industry-Standard Color-Coded Bands: Vibrant painted identification rings permit rapid visual size identification in dark work areas or tool bags.
  • 6-1/2-Inch Storage Extension Shaft: Extended 1/4-inch drive adapter shaft keeps the socket stored securely while providing maximum reach in confined spaces.

What's Included

  • (1) Klein Tools Quad-4 Coaxial Reversible 4-in-1 Heavy-Duty Metric Impact Flip Socket (9mm, 11mm, 13mm, 14mm)
  • (1) 6-1/2-Inch Extended 1/4-Inch Drive Storage Extension Shaft

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 6512MQS
Tool Classification System Quad-4 4-in-1 Coaxial Metric 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 Metric Socket Sizes 9 mm, 11 mm, 13 mm, and 14 mm 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 4.36 inches (11.1 cm)
Overall Unit Width & Length 0.77 inches W x 0.77 inches L (2.0 cm x 2.0 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 4.0 oz / 0.25 lb (113 g)
Global Trade Item Number GTIN 00092644380167

Pro-Tip: To drive 9 mm or 13 mm metric hardware, push forward firmly against the bolt head so the internal spring mechanism compresses completely. To engage 11 mm or 14 mm hardware, ease forward pressure or flip the socket on the 6-1/2-inch extension shank to utilize the outer socket wall profile directly.