I like their strength and their attachment was easy with glue a bit dirty but it was a hot day and I was up the roof I highly recommend getting small 3M wire clamps. This is how I routed the wires from the outside of my RV to the battery without drilling, no fuss. Easy to make Such a small panel that was in the four corners provided she was great and I will be using two extra mounts from cat height to a small solar panel on my boat.
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