Irwin 3/8 In. Round Most Machineable Metals Countersink

High speed steel with black oxide coating for corrosion resistance. 5 flute design reduces vibration for smoother drilling. Precision-ground 82 deg (degree) tip for countersinking into most machinable metals. 1/4" round shank compatible with all hand held and stationary drills.

• Adjustable four-cutter counterbore for pilot-hole depth control and to cut and clear chips quicker
• Quick-change 1/4" shank reduces slipping in standard chucks
• Compatible with all 1/4" quick-change chucks, including impact drills