If you've experienced trouble installing sprinklers to correct finish grade because you can't find the right riser length...if your pipes are buried in shallow trenches and you want to retrofit to taller pop-up sprinklers...if you're having difficulty raising sprinklers buried under inches of built-up thatch...if you want to be sure when a sprinkler has heavy equipment rolling over the top it can easily be properly readjusted...then here's the perfect solution.