Package Content: Total comes with 6 pieces of metal lawn mower gearbox blade nut fixing kit, including 1*rider plate, 1*thrust plate protection washer, 1*thread nut, 1*thrust washer, 1*hex wrench, 1*socket wrench. Product Size: The rider plate diameter about 73.6mm/2.9inch, the thrust plate protection washer diameter about 45mm/1.77inch, the thread nut diameter about 19mm/0.75inch and the thrust washer diameter about 45mm/1.77inch. Sizes fit most universal models Premium Material: Our universal nut fixing kit is made of high quality metal, with nice rust and corrosion resistance, wear-resistant, high hardness, stable and reliable, not easy to bend, long service life. Easy Installation: Very easy to install, just use the hex key to fix the thrust plate protection washer on the rotating head, then install the thrust washer, rider plate and thread nut one by one, which is high reliability. and no vibration. Wide Application: Our replacement blade adapter kit is suitable for most