These brackets are heavy duty and being galvanized they should last a long time. I used 7 rollers and 4 brackets skipping every other one and then put a 5/8 inch rod all the way across with keeper rings on the ends. I can load a 16 foot raft loaded on to my flatbed trailer with the use of a hand crank boat winch mounted on the front. Thanks Cabelas for selling top quality equipment for a great price.
These adjusting plates are very heavy duty. In restoration of my boat trailer and replacing all the broken, bent, and rusted out brackets and arms, I find these to be far superior to everything I've removed. And the cost was very reasonable. In the future, I will search no farther.