... hardness 2.High resistance 3.Good impact resistance PCD micro drill blanks are composed of a synthetic diamond layer on ... glass, ceramics, porcelain, ceramic and porcelain tile, limestone, slate, marble, granite, stone, and fiberglass. Just add water for lubrication.They are ... made according to customer's specifications.Advantages of our PCD micro drill blanks:1. A wide range of applications:Possible ...