Irwin 73320 Turbo Max Jobber Drill Bit, 5/16-in., High Speed Steel

The Irwin 73320 Turbo Max Jobber Drill Bit is a 5/16-inch high-speed steel drill bit featuring a Turbo Max tip that eliminates walking on flat and curved surfaces, ensuring exact centering and burr-free holes. This jobber-length bit is built for reliable drilling performance with precision construction.

The 135° Turbo Max point geometry automatically centers the bit on the work surface, preventing deflection and walking. The precision-ground spiral flutes and black and gold oxide coating work together to reduce wear, keep the bit sharp longer, and resist corrosion during storage and use. The three-flattened shank provides superior grip in the chuck for stable operation.

Features and Benefits

• 135° Turbo Max Tip: Self-centering point design eliminates walking on flat and curved surfaces and produces burr-free holes with exact centering.
• High Speed Steel Construction: Premium material delivers long-lasting performance and durability across drilling tasks.
• Black and Gold Oxide Coating: Provides maximum corrosion resistance and extends the service life of the bit.
• 3-Flat Shank: The three-flattened shank design improves chuck grip for better stability.
• Precision-Ground Design: Reduces wear and maintains sharpness longer, ensuring reliable drilling over time.

Specifications

• Brand: Irwin
• Model: 73320
• Bit Diameter: 5/16 inch
• Overall Length: 4-1/2 inches
• Type: Jobber length
• Flute Style: Spiral flute
• Shank: 5/16-inch diameter with 3-flat design
• Material: High speed steel
• Coating: Black and gold oxide