66728 7/16 In. X 6 In. M-2 Black Oxide Extended Length Drill Bit

The Irwin 66728 is a 7/16 inch extended length drill bit designed for drilling in hard-to-reach areas and running cables through tight spaces. Built from M-2 high-speed steel with a black oxide coating, this bit delivers the strength and heat resistance needed for demanding applications across wood, metal, and plastic. The extended 6-inch overall length makes it ideal for accessing confined spaces where standard-length bits fall short.

The black oxide finish resists corrosion and wear, protecting the bit in harsh environments and moisture-prone conditions. The split point design ensures a true start every time, eliminating bit walking and delivering precise, consistent holes. Whether you're installing wiring, drilling into multiple materials, or working in confined spaces, this extended length bit simplifies the job and reduces frustration.

Features and Benefits

• M-2 High-Speed Steel: Delivers consistent performance under heavy load and provides excellent strength and heat resistance for durability across various applications.
• Black Oxide Coating: Resists corrosion and harsh environments, extending bit life and protecting against moisture damage.
• Split Point Design: Guarantees a true start and eliminates bit walking, ensuring precise drilling every time.
• Extended Length: At 6 inches overall length, this bit easily accesses tight spaces and hard-to-reach locations for cable routing and confined area drilling.
• Versatile Material Compatibility: Works effectively in wood, metal, and plastic, making it a multi-purpose addition to any toolkit.
• Spiral Flute: Straight shank design supports efficient drilling in multiple substrates for general-purpose use.

Specifications

• Brand: Irwin
• Model: 66728
• Diameter: 7/16 inch
• Overall Length: 6 inches
• Material: M-2 high-speed steel
• Finish: Black oxide
• Point Type: Split point
• Flute Type: Spiral flute
• Shank Type: Straight shank