What are the types of drill bits?

　　1. Center drill: Primarily used to locate the center point before drilling, with optional front-end cone angles of 60°, 75°, and 90°, among others.

　　2. Twist Drill Bits: Widely used in industrial manufacturing, suitable for a variety of drilling tasks.

　　3. Superhard Drill Bits: Made from either solid or tip-end superhard alloy materials, these bits are specifically designed for drilling into challenging materials.

　　4. Oil-hole drill bit: The drill body features two small holes through which cutting fluid flows directly to the cutting edge, effectively dissipating heat and removing chips.

　　5. Deep-hole drill bits: Originally designed for drilling gun barrels and rifle barrels—also known as barrel drills—their straight-flute design efficiently removes chips within cylindrical tubes.

　　6. Drill-reamer: Combines the functions of a drill and a reamer, with the difference between the front drill diameter and the rear reamer diameter serving as the reaming allowance.

　　7. Tapered drill bits: Ideal for machining mold feed inlets, their tapered design meets specific processing requirements.

　　8. Countersink Drill Bit: Also known as a countersink milling cutter, it features a smaller-diameter shank at the front end, designed for both drilling and countersinking operations.

　　9. Tapered drill bits: Specifically designed for drilling tapered holes, available with front-end angles such as 90° and 60° options.

　　10. Triangle Drill Bit: Designed for use with electric drills, its triangular shank ensures the chuck securely holds the bit in place.