87924 Speedbor Spade Drill Bit, 1-1/2 X 4 In., Hex Shank

The Irwin 87924 Speedbor spade drill bit is a wood boring tool engineered for fast, clean drilling in confined spaces. Its shortened 4-inch length delivers easy access between studs, rafters, and inside cabinetry where standard bits cannot reach, while the flat flute design ensures precision and durability. The blue groove point and cutting edge remove chips efficiently during drilling.

This spade bit solves the problem of cramped work zones in framing, trim work, cabinet installation, and plumbing rough-in. The double cutting spurs scribe both sides of the hole, producing clean exit points and reducing breakout damage to the workpiece. Whether you are running wiring, plumbing pipes, or hardware through wood framing, this compact bit delivers straight, perpendicular holes that require minimal finishing.

Features and Benefits

• Compact 4-inch length: Reaches into tight spaces between studs, rafters, and inside cabinets for maneuverability where longer bits fail.
• 1-1/2-inch cutting diameter: Creates a generous hole size for wiring and plumbing runs without multiple passes.
• Double cutting spurs: Scribe the outside of the hole to reduce breakout and produce clean, professional results on both entry and exit surfaces.
• Blue groove point and cutting edge: Removes chips efficiently during drilling operations.
• Grooved hex shank: Prevents slipping in the drill chuck or bit extensions and fits all standard quick-change chucks.
• Flat flute design: Delivers consistent performance for wood boring applications.

Specifications

• Brand: Irwin
• Model: 87924
• Cutting diameter: 1-1/2 inches
• Overall length: 4 inches
• Shank diameter: 1/4 inch
• Shank type: Hex, grooved
• Flute design: Flat
• Compatible with: Standard quick-change drill chucks and bit extensions