Review on CIPA 11953 Clip On Towing Mirror by Mark Raj

Normal fix -- Had something similar on my GMC 3/4T Duramax and they lasted for years. This pair is fine but the mount is prone to vibration and on the passenger side the rubber mount has broken and one of the two bolts has been lost. I managed to use a coupler and wing nut so the mirrors can still be used - but 2 breaks/failures on something so new? is that easy? Why did it only get 3 stars.