Like anything and everything else on our trucks if u leave it alone it will get loose or rust. Covers not just are good to keep a properly lubed cable clean of debri they look good. If someone wants to put it on over the rusty cable and leave it they will get what they asked for. It in my opinion finishes off a nice restoration, My cables all have been pulled and wiped clean and greased with the proper mil spec grease, it is awesome stuff, and to keep it where it is supposed to be a cover is wonderful, Also the most harmful of all elements is ultra violet light , keep everything lubed and in the dark i always say...Jtonka is the place to go for me, beachwood is so much more money than anyone else its silly to even go there. newlife is a good honest place with a great product also. But I preffer to spend my money on the local guy, John tennis is the man for sure. in fact i just got another one for another 5 ton last weekend at gilbert from John. ...Good luck ...randy