tungsten carbide ,including G8 G10 G12 G16 G20 G25 G30 - more info check here: http://www.buyindustrialtools.com/81-G-16-10243639/
Quick Brief
Place of Origin: Hebei China (Mainland)Brand Name: hengkaiModel Number: 81-GType: Indexable Drill BitMaterial: Tungsten CarbideUse: wood ,metal ,machiningtungsten carbide: black