A studio photograph of the KT Pro Tools A3401MP 6-piece impact hex bit socket set, featuring six black 3/8 inch drive metric sockets organized in a white foam tray inside an open blue metal carrying case.
A studio photograph of the KT Pro Tools A3401MP 6-piece impact hex bit socket set, featuring six black 3/8 inch drive metric sockets organized in a white foam tray inside an open blue metal carrying case.
A studio photograph of the KT Pro Tools A3401MP 6-piece impact hex bit socket set, featuring six black 3/8 inch drive metric sockets organized in a white foam tray inside an open blue metal carrying case.
A studio photograph of the KT Pro Tools A3401MP 6-piece impact hex bit socket set, featuring six black 3/8 inch drive metric sockets organized in a white foam tray inside an open blue metal carrying case.
KT Pro

KT Pro Tools Socket Set A3401MP 3/8 Inch Drive Metric Impact Hex Bit (6 Pc CR-MO Steel 4mm-12mm 6 Point Automotive Brake Engine Machinery Repair)

Only 1 left
SKU: A6491MP
$37.97 USD

Description

Precision KT Pro Tools 6 Piece 3/8 Inch Drive Metric Impact Hex Bit Socket Set A3401MP

The KT Pro Tools A3401MP 6-Piece 3/8-Inch Drive Metric Impact Hex Bit Socket Set functions as a heavy-duty mechanical fastener driver kit engineered to execute high-torque removal and installation of internal hex fasteners across automotive braking systems, machinery assemblies, and engine components. Manufactured from impact-grade Chrome Molybdenum (CR-MO) alloy steel with an anti-corrosive black phosphate finish, this 3/8-inch square drive socket set features a 6-point precision-machined hex geometry covering sizes from 4mm to 12mm. Designed for seamless operation with pneumatic and cordless impact wrenches, this professional socket array delivers maximum engagement along fastener walls to prevent rounding, head stripping, and socket fracture during high-impact shop operations.

Best Used For:

  • Automotive Brake Caliper & Suspension Servicing: Extracting stubborn metric hex bolts on brake caliper brackets, rotor retainers, and suspension components on European and Asian vehicles.
  • Engine Component & Intake Manifold Maintenance: Driving internal metric hex fasteners on engine valve covers, intake manifolds, and belt tensioner assemblies.
  • Industrial Machinery Equipment Repair: Servicing industrial machinery, hydraulic mounts, and mechanical assemblies requiring high-torque 3/8-inch impact drive tools.

Key Performance & Safety Features

  • High-Impact CR-MO Alloy Steel Construction: Forged from premium Chrome Molybdenum steel to absorb extreme torsional shock without cracking or shattering under impact wrench torque.
  • 6-Point Precision Hex Geometry: Machined to exact metric tolerances to ensure maximum contact with fastener sidewalls and eliminate fastener head rounding.
  • Laser-Etched High-Visibility Side Markings: Permanent size identification stamped directly on each socket body for rapid selection in low-light automotive bays.
  • Industrial Black Phosphate Protective Finish: Chemical coating resists corrosion, rust, and surface abrasion from shop solvents and grease exposure.
  • Standard 3/8-Inch Square Drive Retaining Hole: Features a pin/ball detent hole on the drive end for secure lock-on connection to impact anvils and ratchets.

What's Included

  • (1) 3/8" Drive 4mm Metric Impact Hex Bit Socket
  • (1) 3/8" Drive 5mm Metric Impact Hex Bit Socket
  • (1) 3/8" Drive 6mm Metric Impact Hex Bit Socket
  • (1) 3/8" Drive 8mm Metric Impact Hex Bit Socket
  • (1) 3/8" Drive 10mm Metric Impact Hex Bit Socket
  • (1) 3/8" Drive 12mm Metric Impact Hex Bit Socket

Technical Specifications

Brand Name KT Pro Tools
Model Number SKU A3401MP
Product Tool Classification Impact Hex Bit Socket Set
Drive Square Size 0.375 in. (3/8 in.)
Measurement System Metric Standard
Total Piece Count 6 Pieces
Socket Fastener Profile 6 Point Internal Hex
Minimum Socket Size 4mm (0.157 in.)
Maximum Socket Size 12mm (0.472 in.)
Included Size Range 4mm, 5mm, 6mm, 8mm, 10mm, 12mm
Material Composition Chrome Molybdenum (CR-MO) Alloy Steel
Protective Surface Finish Black Phosphate Corrosion Resistant Coating
Identification Marking Style High-Visibility Standard Side Markings
Machine Equipment Compatibility Air Impact Wrenches, Cordless Impact Drivers, 3/8" Ratchets

Pro-Tip: Before applying high torque with a pneumatic impact driver on recessed internal hex bolts, inspect the hex cavity and clear out rust, road grime, or dried threadlocker using a wire brush. Fully seating the bit socket into the bottom of the fastener head ensures 100% surface engagement, eliminating bit twist and preventing stripped hex heads.