The cutter is a common cutting tool that is usually used to cut materials into desired shapes and sizes. It achieves cutting through linear or rotary motion and is suitable for thinner materials such as paper and plastic film. A paring knife cuts faster, but may not work as well with thicker or harder materials. While the fly cutter is a high-speed rotary cutting tool, through the high-speed rotation of the blade to achieve cutting. The fly cutter is suitable for thicker or harder materials such as leather, rubber, foam, etc. It cuts very fast and can achieve precise cutting results. Flying knives are usually used in automated cutting equipment in industrial production.