1,K25 material 2,Silver Brazing from USA 3,CNC cut and better life, Much more oecumenical for customer.. 4,Solid carbide bur 2. More than 100 specifications is developed to satisfy your fully professional requirement on grinding; 3. You can choose 3 different surface color (self-colored & not plated; Silver & nickel plated; Gold & Ti plated); 4. Keep the surface clean (Oil on surface have been ...