The Glass Drill Bits are suitable for different glass drill machines. The Drill Bits are processed by sintered, so the bits can be reliable,durable, and sharp. drilling bit diameter 3mm-220mm available. international service team design&manufacture&quality check team Contact us if you need more details on Diamond Drilling Bits. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Drill Bits、Glass Drill Bits. If these products fail to match your need, please contact us and we would like to provide relevant information.