I bought these because I blew out the stock plastic ones on one side of my rig. These look nice, I am sure they are bulletproof, but the machine work is very poor. Everything is very loose! The bearings are extremely loose in the bores, the kingpins are loose. If you don't care if your tires wobble around and are loose, then these are ok. I would take the same money and buy 3 sets of the plastic ones and you would be better off.