I purchased and installed these on my '99 Wrangler (which I tested and made sure they fit) less than a week after installing one of the bolts that came off during the ride had sheared off. The whole wheel fell off. Luckily no one was hurt except my jeep. It's aluminum, which, according to discussions with some fellow mechanics, doesn't perform well under stress or pressure (probably shouldn't be sold as part of a Jeep).