High quality materials: Made of high quality metal, stable performance, high reliability and not easy to corrode. Easy to install: Use this fixing kit to fix the blade of the rotary head trimmer. Easy to use: The product is easy to use and very useful. It is stable and reliable and is a good replacement kit. General Accessories: Upper and lower spacers, protective cover, anti-thread nut mounting kit fits most lawnmowers lawn. Scope of application: Suitable for most lawn mowers, brush cutters and paper shredders.