Irwin Black Oxide reduced shank drill bits are made from M-2 high speed steel for a combination of strength, heat resistance, and wear resistance. The black oxide coating provides corrosion protection, while the 135-degree split point starts true and eliminates bit walking.

• 7/16" diameter
• M-2 high speed steel construction
• Black oxide coating resists corrosion
• 135-degree split point for true starts - no walking
• 3/8" reduced shank fits standard drill chucks
• For general use in wood, metal, and plastic
• 1 bit per card