I bought two of these to replace mine which was bent in a car accident. I used this on a 36 inch belt drive Scag lawnmower. From the picture they looked like they were made of thinner steel and also more brittle so I bought them with skepticism. Steel, just like the original trailing forks and just as strong. The fork arm has a film of oil on it, so be careful when removing it from the box. Older wheels bolt easily.