What can we do if we find your diamond tools are not in good performance?

Please kindly send us the details report as feedback, like the pictures and videos. We will analize the possible reasons and try to find a way to solve the problem. If the problem is due to the quality of Mosdan Diamond Tools product itself, we will make the compensation according to your actual loss and send you new replacement , even some payment refound, but not inclduing the shipping cost.