88805 Speedbor Spade Drill Bit, 5/16 In. X 6 In. Oal

The Irwin 88805 Speedbor spade drill bit is engineered for fast, clean hole boring in wood and soft materials. Featuring a precision-ground blue groove point and cutting edge, this bit delivers superior chip removal and reduces breakout, leaving smooth finished holes in lumber, plywood, and composite panels. The grooved hex shank locks firmly into standard drill chucks and bit extensions, eliminating slippage and ensuring consistent power transfer for both DIY and professional applications.

This 5/16-inch bit reduces fatigue during extended use and helps you complete drilling tasks faster and with fewer passes. The design's parabolic scoop geometry clears chips efficiently, reducing binding and delivering reliable performance across wood boring jobs.

Features and Benefits

• Blue groove point and cutting edge: Enhances visibility during drilling and resists wear, extending bit life while improving chip removal efficiency.
• Single pointed spurs: Scribe the outside hole perimeter to reduce wood breakout and deliver clean, precise edges on exit.
• Grooved hex shank: Locks securely in standard quick-change chucks and bit extensions, preventing slippage and ensuring reliable power delivery.
• Optimized for wood materials: Designed specifically for boring in softwoods, hardwoods, and composite panels with speed and accuracy.
• No special adapters required: Fits all standard drill chucks and extensions out of the box.
• Parabolic scoop design: Reduces chip buildup during each pass for smoother, faster drilling.

Specifications

• Brand: Irwin
• Model: 88805
• Bit diameter: 5/16 inch
• Overall length: 6 inches
• Shank type: 1/4 inch hex shank
• Point design: Blue groove with single pointed spurs