Klein 652QS Quad-8 set showing small and medium coaxial sockets mounted together on a 1/4-inch hex impact extension shaft.
Diagram detailing 4 SAE sizes in 1 socket body, color-coded rings, deep-well profile, and high-torque impact rating.
Diagram demonstrating coaxial spring compression where forward force retracts inner sleeve walls to access larger hex fasteners.
Overview of included components showing small and medium Quad-sockets alongside the 6.5-inch 1/4-inch hex impact extension rod.
Klein Quad-8 impact flip socket attached to a power impact driver chuck to highlight 1/4-inch hex drive tool compatibility.
How A Quad Socket Works (651QS, 652QS, 653QS, 654QS and 656QS) promotional video
Klein 652QS Quad-8 set showing small and medium coaxial sockets mounted together on a 1/4-inch hex impact extension shaft.
Diagram detailing 4 SAE sizes in 1 socket body, color-coded rings, deep-well profile, and high-torque impact rating.
Diagram demonstrating coaxial spring compression where forward force retracts inner sleeve walls to access larger hex fasteners.
Overview of included components showing small and medium Quad-sockets alongside the 6.5-inch 1/4-inch hex impact extension rod.
Klein Quad-8 impact flip socket attached to a power impact driver chuck to highlight 1/4-inch hex drive tool compatibility.
How A Quad Socket Works (651QS, 652QS, 653QS, 654QS and 656QS) promotional video
KLEIN TOOLS

Klein Tools SAE Impact Flip Socket Set 652QS 3 Piece Quad 8 (1/4 Hex Drive Deep Well Spring Loaded Steel Fastening Extension Kit)

Only 2 left
SKU: 652QS
$34.98 USD

Description

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Klein Tools 652QS Quad-8 SAE 3-Piece Deep-Well Heavy-Duty Impact Flip Socket Set

The Klein Tools 652QS Quad-8 Heavy-Duty Impact Flip Socket Set combines eight primary imperial hex dimensions across two dual-ended reversible sockets mounted on a single 1/4-inch hex impact extension shaft. Forged from heat-treated cold-forged alloy steel, this 8.48 oz (0.53 lb) ASME B107.2 compliant set includes a small socket (1/4", 5/16", 3/8", 7/16") and a medium socket (1/2", 9/16", 5/8", 11/16") storing directly on the 6.7-inch extension rod. Featuring internal spring-loaded coaxial socket walls and deep-well profiles, this versatile attachment system allows electrical contractors, HVAC mechanics, and commercial installers to compress inner socket sleeves directly over bolt heads for rapid, hands-free size transitions without detaching components from power impact drivers.

Best Used For:

  • HVAC Ductwork & Sheet Metal Fastening: Driving 1/4-inch to 11/16-inch sheet metal screws, flange bolts, and framing hardware without switching out individual driver bits.
  • Electrical Enclosure & Ground Lug Installation: Securing transformer mounts, conduit straps, and panel grounding lugs utilizing deep-well socket clearance for extended threads.
  • 1/4-Inch Power Impact Driver Operations: Mounting onto standard 1/4-inch quick-change impact driver chucks for high-torque assembly and structural fastener installation.

Key Performance & Safety Features

  • 8 SAE Hex Sizes in 2 Sockets: Consolidates 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", and 11/16" hex dimensions into a compact 3-piece driving set.
  • Hands-Free Spring-Loaded Action: Coaxial inner sleeve compresses under forward pressure to instantly expose larger hex openings without manual adjustment.
  • Heat-Treated Cold-Forged Steel Metallurgy: Premium alloy steel construction satisfies ASME B107.2 strength standards to resist extreme rotational impact torque.
  • Dual-Socket Extension Shaft Storage: Stores both the small and medium Quad-sockets simultaneously on the 1/4-inch impact shank for immediate availability aloft.
  • Color-Coded Visual Identification: Painted color rings provide instant visual size callouts inside dark junction boxes and crowded jobsite tool bags.
  • Deep-Well Access Geometry: Provides optimal depth clearance for long threaded studs, recessed nuts, and tight mechanical enclosure corners.

What's Included

  • (1) Klein Tools Small Quad-4 SAE Flip Socket (1/4", 5/16", 3/8", 7/16")
  • (1) Klein Tools Medium Quad-4 SAE Flip Socket (1/2", 9/16", 5/8", 11/16")
  • (1) Klein Tools 1/4-Inch Hex Quick-Change Impact Extension Shaft

 

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 652QS
Tool Classification System Quad-8 8-in-1 SAE Deep-Well Impact Flip Socket Set
Core Metallurgy Material Heat-Treated Cold-Forged Steel
Primary Input Drive Interface 1/4 inch Hex Quick-Change Shank
Integrated SAE Socket Sizes 1/4'', 5/16'', 3/8'', 7/16'', 1/2'', 9/16'', 5/8'', 11/16'' Hex
Socket Point Profile Geometry 6-Point Deep Well Profile
Fastener Transition Mechanism Hands-Free Coaxial Spring Compression & Dual Flip Bodies
Manufacturing Quality Standards ASME B107.2 Compliant
Visual Identification System Color-Coded Painted Rings
Overall Unit Dimensions 6.7 inches L x 0.96 inches W x 0.96 inches H (17.0 x 2.4 x 2.4 cm)
High-Voltage Insulated Frame No (Uninsulated - do not use on energized electrical circuits)
Total Piece Count 3 Pieces (2 Flip Sockets + 1 Extension Shaft)
Assembled Net Package Weight 8.48 oz / 0.53 lb (240 g)
Global Trade Item Number GTIN 00092644328916

Pro-Tip: Store both the small and medium Quad-sockets on the long 1/4-inch shaft simultaneously. When transitioning between small sheet metal screws and larger mounting bolts, simply slide off and flip the front socket unit to access all 8 SAE dimensions in seconds without returning to your tool bag.