GBN-A9100
Amber mono-crystal, irregular shape of free cutting edges, good fragility. It works well with resin and vitrified bond tools.
GBN-A9200
Amber mono-crystal, relatively regular shape, good transparency, and high toughness. It is recommended for vitrified bond and electroplated tools.
GBN-A9300
Golden mono-crystal, regular shape, good transparency, toughness, and thermal stability. It is recommended for metal bonded and electroplated tools of stringent application.