High quality materials: in high quality metal, stable performance, high reliability and not easy to corrode. easy to install: use this fixing kit to fix the mower blade with rotary head. easy to use: the product is easy to use and very useful. It is stable and reliable and constitutes a good replacement kit. General accessories: upper and lower spacers, protective cover, anti-filetage nut fixing kit is suitable for most lawn mower. Application: Suitable for most lawn mowers, brushcutters and paper shredders.