our company is now going into our 3rd year we are happy to say.We have made it this far by giving our customers excellent service & an excellent product.Our rockerlocks were originally designed to save my own truck & they did just that.Then we decided to share our design with the rest of the world & help others with their problem, that no one else seemed to know how to fix. including Chrysler corp,Since we developed these & started selling them we have sold hundreds probably well over a thousand with no complaints not many companys can say that.This tells us they are working great for everyone & don't fail.Theres is a thirty day guaranty so you don't risk anything by trying them.If you are having trouble with your rocker arms falling off you must give these a try. It is the only thing that works to fix this problem.