Xa kufikwa kukubhola kumzi mveliso weoyile kunye negesi, ukhetho lwe-drill bit kubalulekile ekusebenzeni nokusebenza. Olunye lwezinto ezithandwayo yi-PDC (i-Polycrystalline Diamond Compact) bit, ngakumbi inguqulelo ye-8 1/2 ye-intshi enee-blade ezi-5. Olu hlobo lwe-drill bit luyenziwe ukubonelela ngentsebenzi ephezulu kwiindlela ezahlukeneyo ze-geological. Ii-PDC bits ziyaziwa ngokuqina kunye nokunxiba