K25 material and Silver Brazing from USA can make better cut and better life, Much more oecumenical for customer. Cutters With Super Fine Criss-cross ToothingUsed for finishing ceramic materials, gold and alloys of precious metals.Coating of carbide burs    Self-colored(not plated)   Nickel coating    Titanium coating    Gold coating    Silver coating    Chromium coatingNearly 200 types of such Hand pieces for your selection Other special types can be produced acc. to your samples