Materials: Different drill bits are suitable for different types of materials. Generally speaking, the material of the drill bit should be harder than the drill bit. For example, tungsten steel drill bits are suitable for hard materials, while high-speed steel drill bits are suitable for soft materials.

Tooth profile: Tooth profile helps improve the cutting efficiency of the drill bit, and different tooth profiles are suitable for different materials and workpieces. For hard materials such as steel, it is recommended to use tungsten steel drill bits; For soft materials such as plastics, it is recommended to use multi tooth high-speed steel drill bits.