High quality materials: Made of high quality metal, stable performance, high reliability and not easy to corrode. Easy to install: Use this mounting kit to attach the mower blade to the rotary head. Easy to use: The product is easy to use and very useful. It is stable and reliable and makes a good replacement kit. General Accessories: Top and Bottom Spacers, Protective Cover, Anti-Thread Nut Fixing Kit Fits Most Lawn Mowers. Scope: Suitable for most lawn mowers, brush cutters and paper chippers.