MABUARN PCD insert is made of polycrystalline diamond. It's suitable for machining aluminum, aluminum alloys, copper, steel alloys, cemented carbide, titanium, magnesium, zinc, lead, glass fiber, carbon fiber reinforced plastics, and other non-metallic. Each pack 5 pieces in one model. Different size and model for your options: 11IR AG60, 11ER AG60, 16IR AG60, 16ER AG60, MGMN200, MGMN300, DCMT070204, DCMT11T304, CCMT060204, CCMT09T304. To meet the turning, boring, threading, grooving machining. copper and steel alloys, cemented carbide, titanium, magnesium, zinc, lead, etc. Glass Fiber, carbon fiber reinforced plastics and other non-metallic.