88710 Speedbor Wood Boring Spade Bit, 5/8 X 16 In.

The Irwin 88710 Speedbor is a 5/8-inch diameter wood boring spade bit designed for drilling deep, clean holes in timber and plywood. Its flat flute profile and elongated shape allow it to cut efficiently through wood. The 16-inch overall length reaches deep cavities and hard-to-access holes without requiring bit extensions, making it ideal for structural work, cabinetry, furniture making, hardware installation, and general woodworking projects.

The Irwin Speedbor features design elements that reduce breakout and tearout, delivering clean edges and a professional finish. The double cutting spurs scribe the hole perimeter before the main flutes cut, controlling the hole edge quality.

Features and Benefits

• Blue Groove Point and Cutting Edge: The grooved design provides faster chip removal during drilling.
• Double Cutting Spurs: Precision-ground spurs at the bit's perimeter scribe the hole outline before the flutes cut, reducing breakout for a professional finish.
• Flat Flute Design: The elongated, flat profile cuts smoothly through wood and allows the bit to slide efficiently through material.
• Grooved Hex Shank: The 1/4-inch diameter hex shank features grooves that grip firmly in standard drill chucks and bit extensions, preventing slipping while maintaining accurate alignment and steady torque.
• Extended Length: The 16-inch overall length allows access to deep or hard-to-reach holes in thick lumber without bit extensions.

Specifications

• Brand: Irwin
• Model: 88710
• Bit Diameter: 5/8 inch
• Overall Length: 16 inches
• Shank Diameter: 1/4 inch
• Shank Type: Grooved hex
• Flute Type: Flat flute
• Compatible with: All standard quick-change chucks and drill bit extensions