Thanks for taking the time to respond and giving us your feedback, we're sorry to hear you were not pleased with the product. Up till now, we have had 100% excellent feedback on this product so we are surprised to hear the issues you had and would like to address them. Please let us know the material you were drilling, the speed, the type of drill and the pressure, and hopefully we can help you out with the correct drill bit to use for your application. Thanks once again.