Great product from a great company. Don't hesitate to buy again. Keep the Uniballs lubricated with Tri-Flow and you won't hear any squeaks. Lubricate the mirrors with an adequate amount of grease, but make sure the bushings do not protrude or premature bushing failure will occur. Hook multiple grease fittings at a 90-degree angle to facilitate lubrication in hard-to-reach places, and be careful not to break the grease fittings when tightening them in the threaded holes. They don't take long to tighten and the threads on the mirrors don't quite fit, but as long as they're tight you're fine. The universal screw is a grade 8 hex head screw, pitch 9/16-18, 5 inches long in case you shear the screw off for any reason.