This gadget did not fix a single cd game that I have tried repairing it with. I ended up with a useless gadget that was no longer useable as the sanding wheel finally wore out. The replacement wheel itself cost a third of the actual machine! I wasn't about to waste more money on this useless piece of junk. I have read the directions and used the product properly. Theoretically, this product should work but in practice it really does not. It may work with very slight scratches in some cases, but, in my experience it did not even repair the minor scratches. Do yourself a favor and just purchase a new disc and save yourself the headache, time (it takes quite a bit of time) and money. I learned the hard way and hope that others will learn from my mistake.