... ,glass,ceramics,refractory materials and reinforced concrete and so on Diamond Core Bits for marble and granite are used for drilling all kinds ... ,Size: 8mm--200mm.M14,5/8"-11 Connection3,Feture:fast cutting and long life4,MOQ:50pcs5,Payment : T/T6,Packing : Carton7 ... days8,Delivery port: XiamenVarious specifications are available upon your request. Diamond Core Bits for marble and granite