Originally Posted by bikendan
Harbor Freight has similar poles for WAY less than CW.
The Harbor Freight set was what I tried. The magnets were weak as were the extending uprights. They didn't hold up. Stronger magnets and a one-piece shaft may have made the difference.
We went to the license plate camera for its many safety advantages in everyday use as-well-as connecting to a trailer. The advantage of the License plate camera is that you can still get a rear view picture with the tail gate down-and, you know when the tail gate is down. It seems that people in parking lots lose their common sense. They will see someone backing out of a stall and continue walking/driving because "they have the right-of-way". And they do, provided that the person backing up can see them. We have the camera so we can. Rear view mirrors use in parking stalls is very limited. We also use after market back up sensors. Both are worth their salt.
By manufacturer, some vehicles come standard with back up cameras and back up sensors. It is optional with others. I believe they will become mandatory in coming model years.