Best Craftsman Twist Drill Bits in 2026

Understanding Material Composition

The most critical decision you will make is choosing the material of the bit. This is dictated entirely by what you are drilling into. For general-purpose tasks involving wood, plastic, or soft metals, High-Speed Steel (HSS) is the industry standard. HSS bits are versatile and cost-effective, making them perfect for DIY enthusiasts who need a reliable set for household repairs. However, if you move into harder metals like stainless steel or heavy-duty alloys, HSS may dull too quickly. In these cases, look for Cobalt-alloy bits. Cobalt bits are engineered to withstand much higher temperatures without losing their hardness, allowing them to slice through tough metals without the tip melting or softening under friction.

Tip Geometry and Point Angles

The 'twist' in a twist drill bit is only half the story. The geometry of the tip is what actually initiates the cut. Most standard bits feature a 118-degree point angle, which is the 'jack-of-all-trades' setting suitable for wood and soft metals. If you are working on harder materials, you might encounter bits with a 135-degree split point. A split point is a significant upgrade because it prevents the bit from 'walking' or skidding across the surface of your workpiece when you start the hole. This feature is essential for precision work where you cannot afford to mar the surface of a metal plate or a finished piece of lumber.

Flute Design and Chip Evacuation

The grooves running up the length of the bit are known as flutes. Their primary job is to pull the waste material (chips or sawdust) out of the hole as the bit spins. If the flutes are too shallow or poorly designed, the debris will clog the hole, causing friction, heat, and eventually stalling your drill or snapping the bit. For woodworking, wider flutes are often preferred to handle larger volumes of sawdust. For metalworking, more tightly wound, precise flutes help manage the fine, hot metal shavings. When selecting a set, observe the depth and smoothness of these flutes. A clean, polished flute surface helps the material flow more freely.

Shank Type and Compatibility

Before purchasing, ensure the shank of the bit matches your drilling equipment. Most standard twist bits feature a cylindrical shank designed for three-jaw chucks found on most handheld power drills and drill presses. However, if you are using an impact driver for quick tasks, you may need bits with a hex-shank design to ensure a secure, non-slip connection. For high-precision workshop environments, ensuring the shank is perfectly centered is vital to prevent 'runout,' which is the wobbling of the bit that creates oversized, uneven holes.

Summary Recommendation Logic

To choose the right bit, follow this logic: If you are doing general home maintenance on wood or plastic, a standard HSS set is your best value. If you are a hobbyist machinist or working with steel, invest the extra capital in Cobalt-infused bits with a 135-degree split point. Always prioritize a bit with polished flutes to ensure longevity and heat management.