For boring holes in rough work, the speed bore or ___ is commonly used.

For boring holes in rough work, the speed bore or ___ is commonly used.

• A. Twist bit
• B. Brad-point bit
• C. Spade bit
• D. Forstner bit

Answer: (C)

For rough holes in wood, you want a bit that removes material quickly rather than one that leaves a perfectly finished edge. The speed bore, known as a spade bit, has a wide, flat paddle-like cutting edge that bites into the wood aggressively and clears chips fast. That design lets you drill large-diameter holes quickly with minimal binding, which is exactly what rough work needs. While other bits have their strengths—twist bits are versatile for smaller holes, Brad-point bits give clean entry and edges, and Forstner bits produce precise, flat-bottom holes—they’re not as efficient for rapid, rough hole drilling as the spade bit.

For rough holes in wood, you want a bit that removes material quickly rather than one that leaves a perfectly finished edge. The speed bore, known as a spade bit, has a wide, flat paddle-like cutting edge that bites into the wood aggressively and clears chips fast. That design lets you drill large-diameter holes quickly with minimal binding, which is exactly what rough work needs. While other bits have their strengths—twist bits are versatile for smaller holes, Brad-point bits give clean entry and edges, and Forstner bits produce precise, flat-bottom holes—they’re not as efficient for rapid, rough hole drilling as the spade bit.