Good Tool Kit: The universal nut attachment kit is a good tool kit for finer trimmers. Nut attachment kit UNIVERSAL NUT: The universal mower driveline nut attachment kit fits most lawn mowers with six tine heads. Easy to Install: The brush cutter blade attaches to the rotary head with this attachment kit. Material: Made of high quality metal, durable and long lasting. Fits most lawn mowers, trimmers, brush cutters.