Impregnated Diamond core bits Description: The impregnated diamond drill bits are the most commonly useful bits in the mineral exploration industry, as they have the widest range of application. The high grades of synthetic diamond are distributed in the bit's matrix. Casing Shoe: The casing shoe bit is mainly used in handling casing tube in the shallow earth surfaces, and we have casing shoes bit in different hardness to better fit various casing tube bits. The casing shoe diamond bit is mainly made up of diamond single crystal steel body, tungsten carbide and polycrystalline diamond. Main functions of casing shoe: 1): Protect casing ends from distortion. 2): Help casing pass through stratum to bed rock. 3): Carry mud to earth surface. 4): Help down-pass of casing when drill rod is in hole. size available: Q series(Wireline Series): AQ, BQ, NQ, HQ, PQ, SQ,BQ3, NQ3, HQ3, PQ3 W Series: RW, EW, AW, BW, NW, HW, PW, SW, UW, ZW, HWT, PWT, BWS, NWS Metric Series: 46, 56, 66, 76, 86, 101, 116, 131, 146 X Series: RX, EX, AX, BX, NX, HX, PX, SX, UX, ZX TT series: NQTT, HQTT,PQTT