Irwin 1871043 Impact TURBOMAX Drill Bit, 7/16" Diameter

Highlights:

• Diameter: 7/16"
• Overall Length: 5-1/2"
• One-piece construction withstands higher torque loads than standard quick-change bits
• Exclusive TURBOMAX tip minimizes walking, delivers 10X faster starts, and stays sharp longer
• Made from premium high speed steel with black oxide finish for added corrosion resistance
• 1/4" quick-change shank is designed to work with impact drivers, and reduces slipping in standard drill chucks