Material hardness: Different materials have different hardness, so it is necessary to choose a suitable tool for that material. For example, when carving hard materials such as marble and granite, a diamond engraving knife is usually chosen; For soft materials such as wood and plastic, carbon steel knife 1 can be chosen.

Font size: The size of the font directly affects the selection of the engraving knife. For carving small fonts, it is necessary to choose small cutting tools, such as conical carving knives, which have sharp edges and large cutting angles, and can better depict the lines and edges of the font. For large fonts, you can choose a ring cutter or other suitable tool.

Carving depth: The depth of carving also affects the choice of cutting tools. For occasions that require profound characters, tools with larger angles and higher strength can be chosen to ensure the carving effect.

Detail requirements: If there are high requirements for carving details, such as carving the edges and textures of the font, then a tool that can provide high-precision machining, such as a diamond flat bottomed sharp knife 3, should be selected.