1. diamond imported from United States GE 2. high efficiency 3. processing material : FR2,FR4,CEM1,CEM3 4.various sizes Specification: Description: 1. blade head material : with Polycrystalline diamond composite films of United States GE company and United Kingdom DeBeers company 2. blade body material : Germany and Japan imported high quality tool steels 3. processing material : FR2,FR4,CEM1, ...