These wingnuts are super handy and well designed. They allowed us to place walkway lighting for a neighborhood pier where we needed it without voiding the warranty on our SureStep Flow Thru Decking. It sure beat the ghetto workarounds that some folks in our neighborhood were trying to use. The only issue is when a busybody decides to try to re-arrange lights and loses the wingnut portion.
Simple product that solves an otherwise challenging problem, and they have been holding up great!