IRWIN 1877720 Drill Bit Set, Countersink, Black Oxide, 3-Piece

IRWIN® high speed steel countersinks feature a precision-ground 82-degree tip that makes them ideal for countersinking into most machinable metals. They're made from industrial grade high speed steel.

Key Features:

• Black oxide finish for added corrosion resistance
• The five flute design reduces vibration for smoother drilling and extended life
• 1/4 In. round shank fits all handheld and stationary drills
• Increased durability