88708 Speedbor Wood Boring Spade Drill Bit, 1/2 X 16 In.

The Irwin 88708 Speedbor is a professional-grade spade drill bit designed for boring clean, precise holes in wood. Its extra-long 16-inch flat-profile design enables deep drilling through thick lumber, structural applications, and large-scale woodworking projects without wobble or chatter. The grooved hex shank locks securely in any standard drill chuck or quick-change system, preventing slipping during heavy drilling and delivering consistent torque transfer for reliable performance.

This spade bit tackles demanding wood-boring tasks while minimizing common problems like wood splintering and breakout. The engineered geometry and dual-spur edge design produce burr-free holes with clean, smooth edges, reducing or eliminating the need for secondary finishing work. Whether you're framing a deck, installing hardware, routing conduit, or completing carpentry projects, this bit speeds up the job and improves overall accuracy on the worksite.

Features and Benefits

• Blue Groove Point and Cutting Edge: Accelerates chip removal for faster drilling and improved performance in dense wood.
• Double Cutting Spurs: Two sharp spurs scribe the perimeter of the hole, dramatically reducing breakout and producing clean, burr-free edges.
• Grooved Hex Shank: Prevents slipping in the drill chuck or bit extension, ensuring stable drilling without cam-out during demanding applications.
• Flat-Side Profile: Reduces friction and heat buildup, extending bit life and enabling smooth entry into hardwoods while maintaining alignment.
• Extra-Long Design: 16-inch overall length reaches deep into workpieces, perfect for structural work and projects requiring extended cutting depth.
• Fits All Standard Quick-Change Chucks: Compatible with universal drill systems for versatile use across different tools.

Specifications

• Brand: Irwin
• Model: 88708
• Diameter: 1/2 inch
• Overall Length: 16 inches
• Flute Type: Flat Flute
• Shank Diameter: 1/4 inch
• Shank Type: Hex Shank, Grooved