What indicates a high-speed auger bit?

• A. square tang
• B. tapered tang
• C. flat tang
• D. round tang

Answer: (A)

A bit’s tang is the part that locks into the drill’s drive and transmits the turning force. A square tang provides a solid, four-sided engagement that resists slipping and wobble even at high rotational speeds. This secure fit is essential for high-speed drilling because it keeps the bit aligned and prevents loss of torque, allowing the bit to cut efficiently without deflection. The other tang designs—tapered, flat, or round—tend to work best at slower speeds or with different chucks, where the drive doesn’t require as much positive engagement, but they’re more prone to slipping under high RPM. So, a square tang signals that the auger bit is intended for high-speed use.