Here's a picture of a Blue Ox towbar that had a catastrophic failure at the weld on the part that is attached to the receiver. The towbar is said to be about 18 months old. Blue Ox is said to be willing to reimburse the owner for the towbar and any deductible in exchange for the return of the towbar. It was also reported that Blue Ox has changed their design at the weld point that failed. That's all I know on the subject.

Blue Ox Bar.jpg