... ,T2 66,T2 76 Surface set diamond core bits can be used with any type of core barrels. By varying the diamond grade,size,quality,and ... ,HQ,PQ/AQTK,BQTK,BQ3,NQ2,NQ3,NQTT,HQ3,HQTT,PQ3,PQTTT2 Series: T2 46,T2 56,T2 66,T2 76 ... ,TNW,ATW,BTW,NTW,NXD3,AX,NX,NXC,AXT,T6H,4 9/16,NWD4,412F,SK6L146,TT46,TB56,TS116,CHD101Non-standard ...