When I looked at the picture of this weed wacker attachment, it looked as though it was a well thought out product. After it arrived, I attached it to my weed eater and quickly found the flaw in design. The clamping mechanism to keep the wheels in alignment does not do its job ! I am in the process of adding my own corrective fix to solve this problem. In the long run this fix will do the job and prevent the loss of use. So, unless you are interested in providing your own "fix", I would say, pass on this product.