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 cutting blade to the rotary head. 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 mounting kit adapts to most lawn mowers. range: Suitable for most lawn mowers, strawberries and paper shredders.