1HIGHLY COMPATIBLE: The chainsaw clutch is suitable for many models of chain saws such as for CS370 CS400 CS440 CS450 CS400F CS370F. No matter which model of chainsaw you use, you can easily install it and get the desired results. 2EASY TO INSTALL: Chainsaw clutches are very easy to install and use without complicated operations. Simply follow the regular operation for installation. 3DURABLE MATERIAL: The chainsaw clutches are made of aluminum alloy material, which has excellent damage resistance and hardness for longer service life. 4CORROSION RESISTANCE: The chainsaw clutch has excellent corrosion resistance and remains stable even under unconventional conditions. This makes it ideal for long term use and gives excellent performance no matter what the environment. 5PRACTICAL REPLACEMENT PARTS: If your previous chainsaw clutch parts are broken or deteriorated, you can directly replace them to bring your equipment back to normal operation, and also save the cost of labor and maintenance.