The Irwin SpeedBor Max self-feed bit is engineered for fast, clean drilling of large-diameter holes in wood for plumbing, conduit, and electrical rough-in work. The aggressive screw tip pulls the bit through the material for less effort and faster cuts.

• Drills large-diameter holes in wood for pipe, conduit, and rough-in work
• 7/16" quick-change impact shank - milled shank eliminates runout and wobble
• Aggressive screw-pitch tip pulls the bit for faster drilling
• Three cutting edges extend bit life versus standard self-feed bits
• Replaceable screw tip; resharpenable cutting edges
• Cutting diameter: 1-3/4"
• Overall length: 5"