Good Tool Kit: Universal Nut Fastener Kit is a good tool kit for thinner brushes. Universal Nut Fastener Kit: Universal Gearbox Blade Fastener Kit is suitable for most six tooth trimmer heads. Good replacement kit: Made of high quality metal, durable and long service life. For most lawn mowers, brush cutter. Easy to use: useful and convenient to use. Stable characteristics and high reliability. Easy installation. Use this mounting kit to secure the lawn mower blade to the rotary head.