Black color,friable, semi-blocky shape,excellent micro-fracture which brings terrific performance in grinding efficiency and surface finishing,high speed machining.

Amber color,transparent,semi-blocky shape,mediun toughness,which brings good tools life and widely application.

Black color,medium toughness,semi-blocky shape,good thermal stability,which balances the grinding performance and tool life.

Dark brown color,high toughness,sharp blocky shape,better self-sharpening ability,high thermally stable characteristic,which brings fast regeneration of sharp cutting edge and longer tool life.

Black color,high toughness,blocky shape,better thermal ability,which enhances the tools life.

Dark amber color,blocky shape,very high toughness,very high thermal ability,its better performance and long tools life make it widely used in heavy cutting application.