Stanley, Stanley STMT86407-8B, Stanley Extension Bar, 1/2 Inch Drive Extension Bar, 125mm Extension Bar, 5 Inch Extension Bar, Chrome Vanadium Extension Bar, Socket Extension Bar, Ratchet Extension Bar, Socket Accessory, Mechanic Tools, Automotive Hand Tools, Garage Tools, Workshop Equipment, Industrial Maintenance Tools, Breaker Bar Extension, Professional Socket Tools, Stanley Hand Tools, Lion Tools Mart
Stanley, Stanley STMT86407-8B, Stanley Extension Bar, 1/2 Inch Drive Extension Bar, 125mm Extension Bar, 5 Inch Extension Bar, Chrome Vanadium Extension Bar, Socket Extension Bar, Ratchet Extension Bar, Socket Accessory, Mechanic Tools, Automotive Hand Tools, Garage Tools, Workshop Equipment, Industrial Maintenance Tools, Breaker Bar Extension, Professional Socket Tools, Stanley Hand Tools, Lion Tools Mart
Stanley, Stanley STMT86407-8B, Stanley Extension Bar, 1/2 Inch Drive Extension Bar, 125mm Extension Bar, 5 Inch Extension Bar, Chrome Vanadium Extension Bar, Socket Extension Bar, Ratchet Extension Bar, Socket Accessory, Mechanic Tools, Automotive Hand Tools, Garage Tools, Workshop Equipment, Industrial Maintenance Tools, Breaker Bar Extension, Professional Socket Tools, Stanley Hand Tools, Lion Tools Mart
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Stanley 1/2 Inch Drive 5 Inch (125mm) Extension Bar STMT86407-8B | Automotive, Garage, Workshop, Repair & Maintenance Applications

STANLEY

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The Stanley STMT86407-8B 1/2 Inch Drive 5 Inch (125mm) Extension Bar is a professional-grade socket accessory designed to extend the reach of ratchets, socket wrenches, and breaker bars, allowing users to access deep, recessed, and hard-to-reach fasteners with ease. Manufactured from premium Chrome Vanadium (Cr-V) steel, this extension bar delivers high strength, exceptional durability, and excellent resistance to wear and corrosion, making it ideal for demanding workshop and industrial applications.

The extension bar features a 1/2 inch square drive with a secure ball-detent locking mechanism, ensuring sockets remain firmly attached during operation. Its fully polished chrome finish provides superior rust resistance while allowing easy cleaning after use. Designed for manual operation, the extension bar meets ASME B107.10M, ISO 3316, DIN 3123, and ISO 1174-1 standards, ensuring reliable performance and professional quality.

With an overall length of 125mm (5 inches), the Stanley STMT86407-8B is ideal for reaching bolts and nuts located inside engine compartments, machinery, equipment housings, and confined spaces. It is widely used by professional mechanics, automotive technicians, industrial maintenance personnel, and DIY enthusiasts for everyday fastening and repair tasks.

Product Features

  • Manufactured from premium Chrome Vanadium (Cr-V) steel for superior durability.
  • 1/2 Inch square drive compatible with standard sockets and ratchets.
  • 125mm (5 Inch) extension length provides greater access to recessed fasteners.
  • Fully polished chrome finish resists corrosion and rust.
  • Ball-detent locking system securely retains sockets during use.
  • Designed for manual operation with ratchets, breaker bars, and sliding T-handles.
  • Precision-machined square drive ensures accurate socket engagement.
  • Ideal for accessing tight, narrow, and hard-to-reach locations.
  • Suitable for automotive servicing, machinery maintenance, industrial repairs, and workshop applications.
  • Manufactured to ASME B107.10M, ISO 3316, DIN 3123 & ISO 1174-1 standards.

Specifications

  • Brand: Stanley
  • Model: STMT86407-8B
  • Product Type: Extension Bar
  • Drive Size: 1/2 Inch Square Drive
  • Length: 125 mm (5 Inch)
  • Material: Chrome Vanadium (Cr-V) Steel
  • Finish: Fully Polished Chrome
  • Operation: Manual
  • Socket Retention: Ball Detent
  • Standards: ASME B107.10M, ISO 3316, DIN 3123, ISO 1174-1
  • Application: Automotive, Mechanical, Industrial & Workshop Maintenance
  • Compatible With: Ratchets, Breaker Bars, Socket Wrenches & Sliding T-Handles

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