Diamond core bit NQ, HQ, PQ, NQ2, HQ3, PQ3 T2, T6, LTK NMLC, HMLC, NX BW, NW, HW, PW ... chert, abrasive rock etc. Including impregnated diamond core bit, surface-set diamond bit, reaming shells, casing bit, casing shoe bit, corelifter, corelifter case, core barrel ... detailed specifications or catalog. NQ & HQ impregnated diamond core bit 6mm & 12mm Casing & Casing shoe bit NQ2 & NQ3 double tube & triple ...