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SLACK ADJUST 5/16"DS C2 WRENCH - Kastar

Part #: 7789

The Kastar 7789 Slack Adjust Wrench is an essential tool designed for professional automotive and industrial technicians performing brake system maintenance. Engineered for precision and durability, this specialized wrench facilitates the proper adjustment of slack adjusters on heavy-duty vehicles, ensuring optimal braking performance and safety. Its robust construction is built to withstand the rigorous demands of daily shop use.

Key Features

  • Precise 5/16" Double Square Drive: Specifically designed to engage 5/16-inch double square slack adjusters, providing a secure fit and preventing rounding.
  • Professional-Grade Construction: Manufactured by Kastar, this wrench is constructed from high-strength materials for enhanced longevity and reliable performance in demanding environments.
  • Optimized Length and Leverage: Engineered to provide adequate leverage for accurate slack adjuster adjustments, minimizing effort and improving efficiency.
  • Durable Finish: Features a protective finish that resists corrosion and wear, extending the tool's lifespan even with frequent use.

Applications

This Kastar Slack Adjust Wrench is ideal for mechanics and service technicians working on commercial trucks, buses, and trailers equipped with manual or automatic slack adjusters requiring a 5/16" double square drive. It is crucial for routine brake inspections, adjustments, and repairs to maintain proper brake stroke and comply with safety regulations. This tool supports efficient maintenance procedures in various industrial and fleet service settings.

Only 3 left in stock - order soon

$34.97

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This product was added to our catalog on Saturday 30 May, 2026.

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