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1/4" X 5/16" FULL POLISH DBL BOX WR - Stanley Proto Industrial Tools

Part #: J1118SPL

The Stanley Proto J1118SPL 1/4" x 5/16" Full Polish Double Box Spline Wrench is a professional-grade tool engineered for demanding applications in automotive and industrial settings. Crafted from durable alloy steel, this wrench provides exceptional strength and reliable performance when tackling high-torque fasteners. Its robust construction is designed to ensure a long service life under rigorous conditions.

Key Features

  • Spline Box End Design: The innovative spline configuration offers versatile engagement with 4, 6, 12-point, and specialized spline fasteners, significantly reducing the risk of fastener rounding. This design also provides effective turning power even on partially damaged hardware, and its precise fit helps minimize foreign object debris (FOD).
  • Durable Alloy Steel Construction: Manufactured from high-strength alloy steel, this wrench is built to withstand the rigors of professional use, ensuring longevity and consistent performance in tough environments.
  • Full Polish Chrome Finish: The full polish chrome finish provides superior corrosion resistance, extends the tool's lifespan, and allows for easy cleaning after use in greasy or dirty conditions.
  • Optimized Sizes: Featuring common 1/4 inch and 5/16 inch box ends, this tool is ideally suited for a wide range of small fasteners frequently encountered in mechanical and machinery work.
  • Offset Head Design: The offset design of the box ends allows for improved access to fasteners located in confined or recessed areas, enhancing leverage and user comfort during operation.

Applications

This Stanley Proto double box wrench is an indispensable tool for professional mechanics and industrial technicians. It is ideally suited for automotive repair tasks, including engine component adjustments, chassis maintenance, and securing small assemblies. In industrial settings, it excels in machinery assembly, equipment maintenance, and other applications that require high-performance torque on diverse fastener types. Its design makes it particularly valuable in aerospace and heavy machinery where high tensile strength fasteners and vibration are prevalent.

Specifications

  • Manufacturer: Stanley Proto Industrial Tools
  • Model Number: J1118SPL
  • Sizes: 1/4" x 5/16"
  • Overall Length: 7-1/4 inches
  • Material: Alloy Steel
  • Finish: Full Polish Chrome
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$65.91

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This product was added to our catalog on Sunday 19 July, 2026.

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