... .com, Pallet etcOrigin:ShaanxiProduction Capacity:1000PCS/Month Product Description PDC bits/ PDC drill bits1) Be used for water well, oil field ... ) we are specializes in drill bits, tricone bits, PDC bits bit size range from 3 7/8"to 26", cover ... -whirl Technology The advanced simulation technology, enables the bit more stable in drilling, it can drill interbred formations without serious broken ...