... future1, drilling class PDC: suitable for soft to hard geological drilling in, it is of high impact resistance and ... highest demand. Bit typeMain bit size(mm)Rock coefficientPDC core drill bitSingle pipe75/54.5 94/74 113/89 113/ ... 215.9,244,311,445 Typeall kinds and size PDC bits Applicable water well, oil field, construction, geothermal, directional ... Delivery Time within 7-15 work days PDC drill bits