The wheel shafts are solid steel and fit perfectly. I ordered more than I needed because the factory wheels are getting really loose on my scaffold. Great buy.
Nice casters however I had to modify my scaffolding for them to fit as they were about a 1/8 too big, ended up cutting and welding them on to make them work.
Purchased these wheels for my scaffold to replace the original wheels that had a few broken brakes. These were a direct replacement and got great. The only thing is that I’ve noticed is that these wheels make the scaffold a little harder to push.