This former rolls inside fender seams/lips beautifully! It comes with absolutely no instructions but is easily understood by those who are mechanically astute. Others should seek help to understand it as I read the blogs here and a lot were disappointed with it. Tips: Lubricate the long threaded rod that does a lot of work with wheel bearing grease and really make it's job easier, and remember, thread it in slowly as you work the Poly wheel back and forth and slowly work the lip upward. Also, change the angle of the Poly wheel from almost horizontal at first to 20º then 30º then 40º etc..etc, as you lay the lip back and away from the tire and towards the inside of the fender. You will know when to stop when the fender starts bulging out at you! L0L! Most of all....be patient and you will amaze yourself if this is the first one you have ever done....like it was for me. My wide 295's no longer grind against those missing lips!