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6-5/16 BLK/GLD 135D JLDRILL - Tru Cut Maufacturing

Part #: HDC.312

The Tru Cut Manufacturing HDC.312 is a professional-grade 5/16" Black/Gold 135-Degree Split Point Jobber Drill designed for superior performance in demanding automotive and industrial environments. Engineered for durability and precision, this high-speed steel drill bit delivers consistent results when working with a variety of challenging materials. Its advanced design ensures efficient material removal and extended tool life, making it an essential addition to any professional toolkit.

Key Features

  • Premium High-Speed Steel Construction: Manufactured from high-quality high-speed steel for exceptional strength, heat resistance, and long-lasting durability, capable of withstanding rigorous use in professional settings.
  • Black and Gold Surface Treatment: Features a specialized black and gold finish that reduces friction, enhances chip evacuation, and provides increased wear resistance for faster, smoother drilling and extended tool life compared to standard jobber drills.
  • 135-Degree Split Point: The 135-degree split point is self-centering, eliminating the need for a pilot hole and preventing "walking" on the workpiece, allowing for immediate, precise hole starting.
  • Jobber Length: Designed to jobber length specifications, providing a versatile balance of reach and rigidity for a wide array of drilling applications.
  • Industrial Quality: Built to industrial quality standards with heavy-duty construction for reliable performance in tough applications.
  • Made in USA: Proudly manufactured in the United States, ensuring adherence to high-quality production standards.

Applications

The Tru Cut HDC.312 5/16" Jobber Drill is ideal for professional technicians and mechanics working with a range of materials commonly found in automotive repair and industrial fabrication. It excels in drilling through various types of steel, including low, medium, high carbon, and stainless steel, as well as cast iron, aluminum, and other tough alloys. This drill bit is particularly effective for creating precise holes in vehicle frames, engine components, machinery parts, and structural elements.

We have 24 in stock

$3.67

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This product was added to our catalog on Tuesday 30 June, 2026.

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