[Compatibility] Compatible with Husqvarna chainsaw models 357, 359, 550, 560, 562,not compatible with others. [Function] Provides reliable clutch engagement and smooth power transmission. [Material] Made of hardened steel, resistant to wear, high pressure, and repeated use. [Application] Ideal for chainsaw maintenance and repair, restoring proper clutch operation. [Usage] The extension compressed spring is conveniently designed with dual opening hooks, you can easily attach the hooks to the eyelets., Manufacturer: The Lord of the Tools